七年级上册数学应用题难题 求25道七年级上册数学应用题 带答案的
\u4e03\u5e74\u7ea7\u4e0a\u518c\u6570\u5b66\u96be\u9898100\u9898\uff0c\u8981\u6709\u7b54\u6848\u76841\uff0e\u5c06\u4e00\u6279\u5de5\u4e1a\u6700\u65b0\u52a8\u6001\u4fe1\u606f\u8f93\u5165\u7ba1\u7406\u50a8\u5b58\u7f51\u7edc\uff0c\u7532\u72ec\u505a\u97006\u5c0f\u65f6\uff0c\u4e59\u72ec\u505a\u97004\u5c0f\u65f6\uff0c\u7532\u5148\u505a30\u5206\u949f\uff0c\u7136\u540e\u7532\u3001\u4e59\u4e00\u8d77\u505a\uff0c\u5219\u7532\u3001\u4e59\u4e00\u8d77\u505a\u8fd8\u9700\u591a\u5c11\u5c0f\u65f6\u624d\u80fd\u5b8c\u6210\u5de5\u4f5c\uff1f
2\uff0e\u5144\u5f1f\u4e8c\u4eba\u4eca\u5e74\u5206\u522b\u4e3a15\u5c81\u548c9\u5c81\uff0c\u591a\u5c11\u5e74\u540e\u5144\u7684\u5e74\u9f84\u662f\u5f1f\u7684\u5e74\u9f84\u76842\u500d\uff1f
3\uff0e\u5c06\u4e00\u4e2a\u88c5\u6ee1\u6c34\u7684\u5185\u90e8\u957f\u3001\u5bbd\u3001\u9ad8\u5206\u522b\u4e3a300\u6beb\u7c73\uff0c300\u6beb\u7c73\u548c80\u6beb\u7c73\u7684\u957f\u65b9\u4f53\u94c1\u76d2\u4e2d\u7684\u6c34\uff0c\u5012\u5165\u4e00\u4e2a\u5185\u5f84\u4e3a200\u6beb\u7c73\u7684\u5706\u67f1\u5f62\u6c34\u6876\u4e2d\uff0c\u6b63\u597d\u5012\u6ee1\uff0c\u6c42\u5706\u67f1\u5f62\u6c34\u6876\u7684\u9ad8\uff08\u7cbe\u786e\u52300.1\u6beb\u7c73\uff0c \u22483.14\uff09\uff0e
4\uff0e\u6709\u4e00\u706b\u8f66\u4ee5\u6bcf\u5206\u949f600\u7c73\u7684\u901f\u5ea6\u8981\u8fc7\u5b8c\u7b2c\u4e00\u3001\u7b2c\u4e8c\u4e24\u5ea7\u94c1\u6865\uff0c\u8fc7\u7b2c\u4e8c\u94c1\u6865\u6bd4\u8fc7\u7b2c\u4e00\u94c1\u6865\u9700\u591a5\u79d2\uff0c\u53c8\u77e5\u7b2c\u4e8c\u94c1\u6865\u7684\u957f\u5ea6\u6bd4\u7b2c\u4e00\u94c1\u6865\u957f\u5ea6\u76842\u500d\u77ed50\u7c73\uff0c\u8bd5\u6c42\u5404\u94c1\u6865\u7684\u957f\uff0e
5\uff0e\u6709\u67d0\u79cd\u4e09\u8272\u51b0\u6dc7\u6dcb50\u514b\uff0c\u5496\u5561\u8272\u3001\u7ea2\u8272\u548c\u767d\u8272\u914d\u6599\u7684\u6bd4\u662f2\uff1a3\uff1a5\uff0c\u8fd9\u79cd\u4e09\u8272\u51b0\u6dc7\u6dcb\u4e2d\u5496\u5561\u8272\u3001\u7ea2\u8272\u548c\u767d\u8272\u914d\u6599\u5206\u522b\u662f\u591a\u5c11\u514b\uff1f
6\uff0e\u67d0\u8f66\u95f4\u670916\u540d\u5de5\u4eba\uff0c\u6bcf\u4eba\u6bcf\u5929\u53ef\u52a0\u5de5\u7532\u79cd\u96f6\u4ef65\u4e2a\u6216\u4e59\u79cd\u96f6\u4ef64\u4e2a\uff0e\u5728\u8fd916\u540d\u5de5\u4eba\u4e2d\uff0c\u4e00\u90e8\u5206\u4eba\u52a0\u5de5\u7532\u79cd\u96f6\u4ef6\uff0c\u5176\u4f59\u7684\u52a0\u5de5\u4e59\u79cd\u96f6\u4ef6\uff0e\u5df2\u77e5\u6bcf\u52a0\u5de5\u4e00\u4e2a\u7532\u79cd\u96f6\u4ef6\u53ef\u83b7\u522916\u5143\uff0c\u6bcf\u52a0\u5de5\u4e00\u4e2a\u4e59\u79cd\u96f6\u4ef6\u53ef\u83b7\u522924\u5143\uff0e\u82e5\u6b64\u8f66\u95f4\u4e00\u5171\u83b7\u52291440\u5143\uff0c\u6c42\u8fd9\u4e00\u5929\u6709\u51e0\u4e2a\u5de5\u4eba\u52a0\u5de5\u7532\u79cd\u96f6\u4ef6\uff0e
7\uff0e\u67d0\u5730\u533a\u5c45\u6c11\u751f\u6d3b\u7528\u7535\u57fa\u672c\u4ef7\u683c\u4e3a\u6bcf\u5343\u74e6\u65f60.40\u5143\uff0c\u82e5\u6bcf\u6708\u7528\u7535\u91cf\u8d85\u8fc7a\u5343\u74e6\u65f6\uff0c\u5219\u8d85\u8fc7\u90e8\u5206\u6309\u57fa\u672c\u7535\u4ef7\u768470%\u6536\u8d39\uff0e
\uff081\uff09\u67d0\u6237\u516b\u6708\u4efd\u7528\u753584\u5343\u74e6\u65f6\uff0c\u5171\u4ea4\u7535\u8d3930.72\u5143\uff0c\u6c42a\uff0e
\uff082\uff09\u82e5\u8be5\u7528\u6237\u4e5d\u6708\u4efd\u7684\u5e73\u5747\u7535\u8d39\u4e3a0.36\u5143\uff0c\u5219\u4e5d\u6708\u4efd\u5171\u7528\u7535\u591a\u5c11\u5343\u74e6\uff1f\u5e94\u4ea4\u7535\u8d39\u662f\u591a\u5c11\u5143\uff1f
8\uff0e\u67d0\u5bb6\u7535\u5546\u573a\u8ba1\u5212\u75289\u4e07\u5143\u4ece\u751f\u4ea7\u5382\u5bb6\u8d2d\u8fdb50\u53f0\u7535\u89c6\u673a\uff0e\u5df2\u77e5\u8be5\u5382\u5bb6\u751f\u4ea73\u79cd\u4e0d\u540c\u578b\u53f7\u7684\u7535\u89c6\u673a\uff0c\u51fa\u5382\u4ef7\u5206\u522b\u4e3aA\u79cd\u6bcf\u53f01500\u5143\uff0cB\u79cd\u6bcf\u53f02100\u5143\uff0cC\u79cd\u6bcf\u53f02500\u5143\uff0e
\uff081\uff09\u82e5\u5bb6\u7535\u5546\u573a\u540c\u65f6\u8d2d\u8fdb\u4e24\u79cd\u4e0d\u540c\u578b\u53f7\u7684\u7535\u89c6\u673a\u517150\u53f0\uff0c\u7528\u53bb9\u4e07\u5143\uff0c\u8bf7\u4f60\u7814\u7a76\u4e00\u4e0b\u5546\u573a\u7684\u8fdb\u8d27\u65b9\u6848\uff0e
\uff082\uff09\u82e5\u5546\u573a\u9500\u552e\u4e00\u53f0A\u79cd\u7535\u89c6\u673a\u53ef\u83b7\u5229150\u5143\uff0c\u9500\u552e\u4e00\u53f0B\u79cd\u7535\u89c6\u673a\u53ef\u83b7\u5229200\u5143\uff0c\u9500\u552e\u4e00\u53f0C\u79cd\u7535\u89c6\u673a\u53ef\u83b7\u5229250\u5143\uff0c\u5728\u540c\u65f6\u8d2d\u8fdb\u4e24\u79cd\u4e0d\u540c\u578b\u53f7\u7684\u7535\u89c6\u673a\u65b9\u6848\u4e2d\uff0c\u4e3a\u4e86\u4f7f\u9500\u552e\u65f6\u83b7\u5229\u6700\u591a\uff0c\u4f60\u9009\u62e9\u54ea\u79cd\u65b9\u6848\uff1f
\u7b54\u6848
1\uff0e\u89e3\uff1a\u8bbe\u7532\u3001\u4e59\u4e00\u8d77\u505a\u8fd8\u9700x\u5c0f\u65f6\u624d\u80fd\u5b8c\u6210\u5de5\u4f5c\uff0e
\u6839\u636e\u9898\u610f\uff0c\u5f97 \u00d7 +\uff08 + \uff09x=1
\u89e3\u8fd9\u4e2a\u65b9\u7a0b\uff0c\u5f97x=
=2\u5c0f\u65f612\u5206
\u7b54\uff1a\u7532\u3001\u4e59\u4e00\u8d77\u505a\u8fd8\u97002\u5c0f\u65f612\u5206\u624d\u80fd\u5b8c\u6210\u5de5\u4f5c\uff0e
2\uff0e\u89e3\uff1a\u8bbex\u5e74\u540e\uff0c\u5144\u7684\u5e74\u9f84\u662f\u5f1f\u7684\u5e74\u9f84\u76842\u500d\uff0c
\u5219x\u5e74\u540e\u5144\u7684\u5e74\u9f84\u662f15+x\uff0c\u5f1f\u7684\u5e74\u9f84\u662f9+x\uff0e
\u7531\u9898\u610f\uff0c\u5f972\u00d7\uff089+x\uff09=15+x
18+2x=15+x\uff0c2x-x=15-18
\u2234x=-3
\u7b54\uff1a3\u5e74\u524d\u5144\u7684\u5e74\u9f84\u662f\u5f1f\u7684\u5e74\u9f84\u76842\u500d\uff0e
\uff08\u70b9\u62e8\uff1a-3\u5e74\u7684\u610f\u4e49\uff0c\u5e76\u4e0d\u662f\u6ca1\u6709\u610f\u4e49\uff0c\u800c\u662f\u6307\u4ee5\u4eca\u5e74\u4e3a\u8d77\u70b9\u524d\u76843\u5e74\uff0c\u662f\u4e0e3\u5e74\u540e\u5177\u6709\u76f8\u53cd\u610f\u4e49\u7684\u91cf\uff09
3\uff0e\u89e3\uff1a\u8bbe\u5706\u67f1\u5f62\u6c34\u6876\u7684\u9ad8\u4e3ax\u6beb\u7c73\uff0c\u4f9d\u9898\u610f\uff0c\u5f97
\u00b7\uff08 \uff092x=300\u00d7300\u00d780
x\u2248229.3
\u7b54\uff1a\u5706\u67f1\u5f62\u6c34\u6876\u7684\u9ad8\u7ea6\u4e3a229.3\u6beb\u7c73\uff0e
4\uff0e\u89e3\uff1a\u8bbe\u7b2c\u4e00\u94c1\u6865\u7684\u957f\u4e3ax\u7c73\uff0c\u90a3\u4e48\u7b2c\u4e8c\u94c1\u6865\u7684\u957f\u4e3a\uff082x-50\uff09\u7c73\uff0c\u8fc7\u5b8c\u7b2c\u4e00\u94c1\u6865\u6240\u9700\u7684\u65f6\u95f4\u4e3a \u5206\uff0e
\u8fc7\u5b8c\u7b2c\u4e8c\u94c1\u6865\u6240\u9700\u7684\u65f6\u95f4\u4e3a \u5206\uff0e
\u4f9d\u9898\u610f\uff0c\u53ef\u5217\u51fa\u65b9\u7a0b
+ =
\u89e3\u65b9\u7a0bx+50=2x-50
\u5f97x=100
\u22342x-50=2\u00d7100-50=150
\u7b54\uff1a\u7b2c\u4e00\u94c1\u6865\u957f100\u7c73\uff0c\u7b2c\u4e8c\u94c1\u6865\u957f150\u7c73\uff0e
5\uff0e\u89e3\uff1a\u8bbe\u8fd9\u79cd\u4e09\u8272\u51b0\u6dc7\u6dcb\u4e2d\u5496\u5561\u8272\u914d\u6599\u4e3a2x\u514b\uff0c
\u90a3\u4e48\u7ea2\u8272\u548c\u767d\u8272\u914d\u6599\u5206\u522b\u4e3a3x\u514b\u548c5x\u514b\uff0e
\u6839\u636e\u9898\u610f\uff0c\u5f972x+3x+5x=50
\u89e3\u8fd9\u4e2a\u65b9\u7a0b\uff0c\u5f97x=5
\u4e8e\u662f2x=10\uff0c3x=15\uff0c5x=25
\u7b54\uff1a\u8fd9\u79cd\u4e09\u8272\u51b0\u6dc7\u6dcb\u4e2d\u5496\u5561\u8272\u3001\u7ea2\u8272\u548c\u767d\u8272\u914d\u6599\u5206\u522b\u662f10\u514b\uff0c15\u514b\u548c25\u514b\uff0e
6\uff0e\u89e3\uff1a\u8bbe\u8fd9\u4e00\u5929\u6709x\u540d\u5de5\u4eba\u52a0\u5de5\u7532\u79cd\u96f6\u4ef6\uff0c
\u5219\u8fd9\u5929\u52a0\u5de5\u7532\u79cd\u96f6\u4ef6\u67095x\u4e2a\uff0c\u4e59\u79cd\u96f6\u4ef6\u67094\uff0816-x\uff09\u4e2a\uff0e
\u6839\u636e\u9898\u610f\uff0c\u5f9716\u00d75x+24\u00d74\uff0816-x\uff09=1440
\u89e3\u5f97x=6
\u7b54\uff1a\u8fd9\u4e00\u5929\u67096\u540d\u5de5\u4eba\u52a0\u5de5\u7532\u79cd\u96f6\u4ef6\uff0e
7\uff0e\u89e3\uff1a\uff081\uff09\u7531\u9898\u610f\uff0c\u5f97
0.4a+\uff0884-a\uff09\u00d70.40\u00d770%=30.72
\u89e3\u5f97a=60
\uff082\uff09\u8bbe\u4e5d\u6708\u4efd\u5171\u7528\u7535x\u5343\u74e6\u65f6\uff0c\u5219
0.40\u00d760+\uff08x-60\uff09\u00d70.40\u00d770%=0.36x
\u89e3\u5f97x=90
\u6240\u4ee50.36\u00d790=32.40\uff08\u5143\uff09
\u7b54\uff1a\u4e5d\u6708\u4efd\u5171\u7528\u753590\u5343\u74e6\u65f6\uff0c\u5e94\u4ea4\u7535\u8d3932.40\u5143\uff0e
8\uff0e\u89e3\uff1a\u6309\u8d2dA\uff0cB\u4e24\u79cd\uff0cB\uff0cC\u4e24\u79cd\uff0cA\uff0cC\u4e24\u79cd\u7535\u89c6\u673a\u8fd9\u4e09\u79cd\u65b9\u6848\u5206\u522b\u8ba1\u7b97\uff0c
\u8bbe\u8d2dA\u79cd\u7535\u89c6\u673ax\u53f0\uff0c\u5219B\u79cd\u7535\u89c6\u673ay\u53f0\uff0e
\uff081\uff09\u2460\u5f53\u9009\u8d2dA\uff0cB\u4e24\u79cd\u7535\u89c6\u673a\u65f6\uff0cB\u79cd\u7535\u89c6\u673a\u8d2d\uff0850-x\uff09\u53f0\uff0c\u53ef\u5f97\u65b9\u7a0b
1500x+2100\uff0850-x\uff09=90000
\u53735x+7\uff0850-x\uff09=300
2x=50
x=25
50-x=25
\u2461\u5f53\u9009\u8d2dA\uff0cC\u4e24\u79cd\u7535\u89c6\u673a\u65f6\uff0cC\u79cd\u7535\u89c6\u673a\u8d2d\uff0850-x\uff09\u53f0\uff0c
\u53ef\u5f97\u65b9\u7a0b1500x+2500\uff0850-x\uff09=90000
3x+5\uff0850-x\uff09=1800
x=35
50-x=15
\u2462\u5f53\u8d2dB\uff0cC\u4e24\u79cd\u7535\u89c6\u673a\u65f6\uff0cC\u79cd\u7535\u89c6\u673a\u4e3a\uff0850-y\uff09\u53f0\uff0e
\u53ef\u5f97\u65b9\u7a0b2100y+2500\uff0850-y\uff09=90000
21y+25\uff0850-y\uff09=900\uff0c4y=350\uff0c\u4e0d\u5408\u9898\u610f
\u7531\u6b64\u53ef\u9009\u62e9\u4e24\u79cd\u65b9\u6848\uff1a\u4e00\u662f\u8d2dA\uff0cB\u4e24\u79cd\u7535\u89c6\u673a25\u53f0\uff1b\u4e8c\u662f\u8d2dA\u79cd\u7535\u89c6\u673a35\u53f0\uff0cC\u79cd\u7535\u89c6\u673a15\u53f0\uff0e
\uff082\uff09\u82e5\u9009\u62e9\uff081\uff09\u4e2d\u7684\u65b9\u6848\u2460\uff0c\u53ef\u83b7\u5229
150\u00d725+250\u00d715=8750\uff08\u5143\uff09
\u82e5\u9009\u62e9\uff081\uff09\u4e2d\u7684\u65b9\u6848\u2461\uff0c\u53ef\u83b7\u5229
150\u00d735+250\u00d715=9000\uff08\u5143\uff09
9000>8750 \u6545\u4e3a\u4e86\u83b7\u5229\u6700\u591a\uff0c\u9009\u62e9\u7b2c\u4e8c\u79cd\u65b9\u6848\uff0e
1.\u67d0\u5546\u5e97\u6709\u4e00\u5957\u8fd0\u52a8\u670d\uff0c\u6309\u6807\u4ef7\u76848\u6298\u51fa\u552e\u4ecd\u53ef\u83b7\u522920\u5143\uff0c\u5df2\u77e5\u8fd9\u5957\u8fd0\u52a8\u670d\u7684\u6210\u672c\u4ef7\u4e3a100\u5143\uff0c\u95ee\u8fd9\u5957\u8fd0\u52a8\u670d\u7684\u6807\u4ef7\u662f\u591a\u5c11\u5143\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u9500\u552e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u8bbe\u8fd9\u5957\u8fd0\u52a8\u670d\u7684\u6807\u4ef7\u662fx\u5143\uff0e
\u6b64\u9898\u4e2d\u7684\u7b49\u91cf\u5173\u7cfb\uff1a\u6309\u6807\u4ef7\u76848\u6298\u51fa\u552e\u4ecd\u53ef\u83b7\u522920\u5143\uff0c\u5373\u6807\u4ef7\u76848\u6298-\u6210\u672c\u4ef7=20\u5143\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u8fd9\u5957\u8fd0\u52a8\u670d\u7684\u6807\u4ef7\u662fx\u5143\uff0e
\u6839\u636e\u9898\u610f\u5f97\uff1a0.8x-100=20\uff0c
\u89e3\u5f97\uff1ax=150\uff0e
\u7b54\uff1a\u8fd9\u5957\u8fd0\u52a8\u670d\u7684\u6807\u4ef7\u4e3a150\u5143\uff0e\u70b9\u8bc4\uff1a\u89e3\u9898\u5173\u952e\u662f\u8981\u8bfb\u61c2\u9898\u76ee\u7684\u610f\u601d\uff0c\u6839\u636e\u9898\u76ee\u7ed9\u51fa\u7684\u6761\u4ef6\uff0c\u627e\u51fa\u5408\u9002\u7684\u7b49\u91cf\u5173\u7cfb\u5217\u51fa\u65b9\u7a0b\uff0c\u518d\u6c42\u89e3\uff0e
2.\u4ece\u7532\u5730\u5230\u4e59\u5730\u7684\u8def\u6709\u4e00\u6bb5\u5e73\u8def\u4e0e\u4e00\u6bb5\u4e0a\u5761\u8def\uff0e\u5982\u679c\u9a91\u81ea\u884c\u8f66\u4fdd\u6301\u5e73\u8def\u6bcf\u5c0f\u65f6\u884c15km\uff0c\u4e0a\u5761\u8def\u6bcf\u5c0f\u65f6\u884c10km\uff0c\u4e0b\u5761\u8def\u6bcf\u5c0f\u65f6\u884c18km\uff0c\u90a3\u4e48\u4ece\u7532\u5730\u5230\u4e59\u5730\u970029min\uff0c\u4ece\u4e59\u5730\u5230\u7532\u5730\u970025min\uff0e\u4ece\u7532\u5730\u5230\u4e59\u5730\u7684\u8def\u7a0b\u662f\u591a\u5c11\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u884c\u7a0b\u95ee\u9898\uff0e\u5206\u6790\uff1a\u672c\u9898\u9996\u5148\u4f9d\u636e\u9898\u610f\u5f97\u51fa\u7b49\u91cf\u5173\u7cfb\u5373\u7532\u5730\u5230\u4e59\u5730\u7684\u8def\u7a0b\u662f\u4e0d\u53d8\u7684\uff0c\u8fdb\u800c\u5217\u51fa\u65b9\u7a0b\u4e3a10\uff08 2960-x\uff09=18\uff08 2560-x\uff09\uff0c\u4ece\u800c\u89e3\u51fa\u65b9\u7a0b\u5e76\u4f5c\u7b54\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u5e73\u8def\u6240\u7528\u65f6\u95f4\u4e3ax\u5c0f\u65f6\uff0c
29\u5206= 2960\u5c0f\u65f6\uff0c25\u5206= 2560\uff0c
\u5219\u4f9d\u636e\u9898\u610f\u5f97\uff1a10\uff08 2960-x\uff09=18\uff08 2560-x\uff09\uff0c
\u89e3\u5f97\uff1ax= 13\uff0c
\u5219\u7532\u5730\u5230\u4e59\u5730\u7684\u8def\u7a0b\u662f15\u00d7 13+10\u00d7\uff08 2960-13\uff09=6.5km\uff0c
\u7b54\uff1a\u4ece\u7532\u5730\u5230\u4e59\u5730\u7684\u8def\u7a0b\u662f6.5km\uff0e\u70b9\u8bc4\uff1a\u672c\u9898\u4e3b\u8981\u8003\u67e5\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0c\u89e3\u9898\u7684\u5173\u952e\u662f\u719f\u7ec3\u638c\u63e1\u5217\u65b9\u7a0b\u89e3\u5e94\u7528\u9898\u7684\u4e00\u822c\u6b65\u9aa4\uff0c\u5373\u2460\u6839\u636e\u9898\u610f\u627e\u51fa\u7b49\u91cf\u5173\u7cfb\u2461\u5217\u51fa\u65b9\u7a0b\u2462\u89e3\u51fa\u65b9\u7a0b
3.2009\u5e74\u5317\u4eac\u5e02\u751f\u4ea7\u8fd0\u8425\u7528\u6c34\u548c\u5c45\u6c11\u5bb6\u5ead\u7528\u6c34\u7684\u603b\u548c\u4e3a5.8\u4ebf\u7acb\u65b9\u7c73\uff0c\u5176\u4e2d\u5c45\u6c11\u5bb6\u5ead\u7528\u6c34\u6bd4\u751f\u4ea7\u8fd0\u8425\u7528\u6c34\u76843\u500d\u8fd8\u591a0.6\u4ebf\u7acb\u65b9\u7c73\uff0c\u95ee\u751f\u4ea7\u8fd0\u8425\u7528\u6c34\u548c\u5c45\u6c11\u5bb6\u5ead\u7528\u6c34\u5404\u591a\u5c11\u4ebf\u7acb\u65b9\u7c73\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff0e\u5206\u6790\uff1a\u7b49\u91cf\u5173\u7cfb\u4e3a\uff1a\u5c45\u6c11\u5bb6\u5ead\u7528\u6c34=\u751f\u4ea7\u8fd0\u8425\u7528\u6c34\u76843\u500d+0.6\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u751f\u4ea7\u8fd0\u8425\u7528\u6c34x\u4ebf\u7acb\u65b9\u7c73\uff0c\u5219\u5c45\u6c11\u5bb6\u5ead\u7528\u6c34\uff085.8-x\uff09\u4ebf\u7acb\u65b9\u7c73\uff0e
\u4f9d\u9898\u610f\uff0c\u5f975.8-x=3x+0.6\uff0c
\u89e3\u5f97\uff1ax=1.3\uff0c
\u22345.8-x=5.8-1.3=4.5\uff0e
\u7b54\uff1a\u751f\u4ea7\u8fd0\u8425\u7528\u6c341.3\u4ebf\u7acb\u65b9\u7c73\uff0c\u5c45\u6c11\u5bb6\u5ead\u7528\u6c344.5\u4ebf\u7acb\u65b9\u7c73\uff0e\u70b9\u8bc4\uff1a\u89e3\u9898\u5173\u952e\u662f\u5f04\u6e05\u9898\u610f\uff0c\u627e\u5230\u5408\u9002\u7684\u7b49\u91cf\u5173\u7cfb\uff0e\u672c\u9898\u4e5f\u53ef\u6839\u636e\u201c\u751f\u4ea7\u8fd0\u8425\u7528\u6c34\u548c\u5c45\u6c11\u5bb6\u5ead\u7528\u6c34\u7684\u603b\u548c\u4e3a5.8\u4ebf\u7acb\u65b9\u7c73\u201d\u6765\u5217\u7b49\u91cf\u5173\u7cfb\uff0e
4.\u5c0f\u534e\u5c06\u52e4\u5de5\u4fed\u5b66\u6323\u5f97\u7684100\u5143\u94b1\u6309\u4e00\u5e74\u5b9a\u671f\u5b58\u5165\u94f6\u884c\uff0c\u5230\u671f\u540e\u53d6\u51fa50\u5143\u6765\u8d2d\u4e70\u5b66\u4e60\u7528\u54c1\uff0c\u5269\u4e0b\u768450\u5143\u548c\u5e94\u5f97\u7684\u5229\u606f\u53c8\u5168\u90e8\u6309\u4e00\u5e74\u5b9a\u671f\u5b58\u5165\u94f6\u884c\uff0c\u82e5\u5b58\u6b3e\u7684\u5e74\u5229\u7387\u53c8\u4e0b\u8c03\u5230\u539f\u6765\u7684\u4e00\u534a\uff0c\u8fd9\u6837\u5230\u671f\u540e\u53ef\u5f97\u672c\u606f\u548c63\u5143\uff0c\u6c42\u7b2c\u4e00\u6b21\u5b58\u6b3e\u7684\u5e74\u5229\u7387\uff08\u4e0d\u8ba1\u5229\u606f\u7a0e\uff09\uff0e\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u589e\u957f\u7387\u95ee\u9898\uff0e\u5206\u6790\uff1a\u8981\u6c42\u5b58\u6b3e\u7684\u5e74\u5229\u7387\u5148\u8bbe\u51fa\u672a\u77e5\u6570\uff0c\u518d\u901a\u8fc7\u7b49\u91cf\u5173\u7cfb\u5c31\u662f\u4e24\u5e74\u7684\u672c\u91d1\u52a0\u4e0a\u5229\u606f\u51cf\u53bb\u591f\u4e70\u5b66\u4e60\u7528\u54c1\u7684\u94b1\u7b49\u4e8e\u6700\u540e\u7684\u672c\u606f\u4e4b\u548c\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u7b2c\u4e00\u6b21\u5b58\u6b3e\u7684\u5e74\u5229\u7387\u4e3ax\uff0c\u5219\u7b2c\u4e8c\u6b21\u5b58\u6b3e\u7684\u5e74\u5229\u7387\u4e3a x2\uff0c\u7b2c\u4e00\u6b21\u7684\u672c\u606f\u548c\u4e3a\uff08100+100\u00d7x\uff09\u5143\uff0e
\u7531\u9898\u610f\uff0c\u5f97\uff08100+100\u00d7x-50\uff09\u00d7 x2+50+100x=63\uff0c
\u89e3\u5f97x=0.1\u6216x= -135\uff08\u820d\u53bb\uff09\uff0e
\u7b54\uff1a\u7b2c\u4e00\u6b21\u5b58\u6b3e\u7684\u5e74\u5229\u7387\u4e3a10%\uff0e\u70b9\u8bc4\uff1a\u89e3\u9898\u7684\u5173\u952e\u8981\u7406\u89e3\u9898\u7684\u5927\u610f\uff0c\u7279\u522b\u662f\u7b2c\u4e8c\u6b21\u5230\u671f\u7684\u672c\u606f\u4e3a50+100x\uff0c\u5f88\u591a\u540c\u5b66\u90fd\u4f1a\u5ffd\u7565100x\uff0c\u6839\u636e\u9898\u76ee\u7ed9\u51fa\u7684\u6761\u4ef6
5.2008\u5e74\u5317\u4eac\u5965\u8fd0\u4f1a\uff0c\u4e2d\u56fd\u8fd0\u52a8\u5458\u83b7\u5f97\u91d1\u3001\u94f6\u3001\u94dc\u724c\u5171100\u679a\uff0c\u91d1\u724c\u6570\u4f4d\u5217\u4e16\u754c\u7b2c\u4e00\uff0e\u5176\u4e2d\u91d1\u724c\u6bd4\u94f6\u724c\u4e0e\u94dc\u724c\u4e4b\u548c\u591a2\u679a\uff0c\u94f6\u724c\u6bd4\u94dc\u724c\u5c117\u679a\uff0e\u95ee\u91d1\u3001\u94f6\u3001\u94dc\u724c\u5404\u591a\u5c11\u679a\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u5206\u6790\uff1a\u53ef\u8bbe\u94f6\u724c\u6570\u4e3ax\u679a\uff0c\u5219\u94dc\u724c\u4e3a\uff08x+7\uff09\u679a\uff0e\u91d1\u724c\u6570\u4e3ax+\uff08x+7\uff09+2\uff0c\u6839\u636e\u83b7\u5f97\u91d1\u3001\u94f6\u3001\u94dc\u724c\u5171100\u679a\u5217\u51fa\u65b9\u7a0b\u6c42\u89e3\u5373\u53ef\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u94f6\u724c\u6570\u4e3ax\u679a\uff0c\u5219\u94dc\u724c\u4e3a\uff08x+7\uff09\u679a\uff0e\u91d1\u724c\u6570\u4e3ax+\uff08x+7\uff09+2\uff0c\uff081\u5206\uff09
\u4f9d\u9898\u610f\u5f97x+\uff08x+7\uff09+x+\uff08x+7\uff09+2=100\uff083\u5206\uff09
\u89e3\u5f97x=21\uff0c\uff085\u5206\uff09
\u6240\u4ee5x+7=21+7=28\uff1b21+28+2=51
\u7b54\uff1a\u91d1\u3001\u94f6\u3001\u94dc\u724c\u5206\u522b\u4e3a51\u679a\u300121\u679a\u300128\u679a\uff0e\uff086\u5206\uff09\u70b9\u8bc4\uff1a\u8003\u67e5\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff1b\u5f97\u5230\u5404\u4e2a\u5956\u724c\u6570\u7684\u7b49\u91cf\u5173\u7cfb\u662f\u89e3\u51b3\u672c\u9898\u7684\u6613\u9519\u70b9\uff0e
6.\u5929\u9a84\u8d85\u5e02\u548c\u91d1\u5e1d\u8d85\u5e02\u4ee5\u540c\u6837\u7684\u4ef7\u683c\u51fa\u552e\u540c\u6837\u7684\u5546\u54c1\uff0c\u4e3a\u4e86\u5438\u5f15\u987e\u5ba2\uff0c\u4e24\u5bb6\u8d85\u5e02\u90fd\u5b9e\u884c\u4f1a\u5458\u5361\u5236\u5ea6\uff0c\u5728\u5929\u9a84\u8d85\u5e02\u7d2f\u8ba1\u8d2d\u4e70500\u5143\u5546\u54c1\u540e\uff0c\u53d1\u7ed9\u5929\u9a84\u4f1a\u5458\u5361\uff0c\u518d\u8d2d\u4e70\u7684\u5546\u54c1\u6309\u539f\u4ef785%\u6536\u8d39\uff1b\u5728\u91d1\u5e1d\u8d85\u5e02\u8d2d\u4e70300\u5143\u7684\u5546\u54c1\u540e\uff0c\u53d1\u7ed9\u91d1\u5e1d\u4f1a\u5458\u5361\uff0c\u518d\u8d2d\u4e70\u7684\u5546\u54c1\u6309\u539f\u4ef790%\u6536\u8d39\uff0c\u8ba8\u8bba\u987e\u5ba2\u600e\u6837\u9009\u62e9\u5546\u5e97\u8d2d\u7269\u80fd\u83b7\u5f97\u66f4\u5927\u4f18\u60e0\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff1b\u4e00\u5143\u4e00\u6b21\u4e0d\u7b49\u5f0f\u7684\u5e94\u7528\uff0e\u5206\u6790\uff1a\u6839\u636e\u9898\u610f\u53ef\u4ee5\u5206\u522b\u5bf9\u4e24\u5bb6\u8d85\u5e02\u5217\u51fa\u82b1\u8d39\u548c\u8d2d\u7269\u91d1\u989dx\u7684\u5173\u7cfb\u5f0f\uff0c\u7136\u540e\u6bd4\u8f83\u4e24\u8005\u5927\u5c0f\uff0c\u5373\u53ef\u5f97\u51fa\u7ed3\u8bba\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u987e\u5ba2\u6240\u82b1\u8d2d\u7269\u6b3e\u4e3ax\u5143\uff0e
\u2460\u5f530\u2264x\u2264300\u65f6\uff0c\u987e\u5ba2\u5728\u4e24\u5bb6\u8d85\u5e02\u8d2d\u7269\u90fd\u4e00\u6837\uff0e
\u2461\u5f53300\uff1cx\u2264500\u65f6\uff0c\u987e\u5ba2\u5728\u91d1\u5e1d\u8d85\u5e02\u8d2d\u7269\u80fd\u5f97\u66f4\u5927\u4f18\u60e0\uff0e
\u5f53x\uff1e500\u65f6\uff0c\u5047\u8bbe\u987e\u5ba2\u5728\u91d1\u5e1d\u8d85\u5e02\u8d2d\u7269\u80fd\u5f97\u66f4\u5927\u4f18\u60e0\u5219300+0.9\uff08x-300\uff09\uff1c500+0.85\uff08x-500\uff09\u89e3\u5f97x\uff1c900\uff0e
\u2462\u6240\u4ee5\u5f53500\uff1cx\uff1c900\u65f6\uff0c\u987e\u5ba2\u5728\u91d1\u5e1d\u8d85\u5e02\u8d2d\u7269\u80fd\u5f97\u66f4\u5927\u4f18\u60e0\uff0e\u540c\u6837\u53ef\u5f97\uff1a
\u2463\u5f53x=900\u65f6\uff0c\u987e\u5ba2\u5728\u4e24\u5bb6\u8d85\u5e02\u8d2d\u7269\u90fd\u4e00\u6837\uff0e
\u2464\u5f53x\uff1e900\u65f6\uff0c\u987e\u5ba2\u5728\u5929\u9a84\u8d85\u5e02\u8d2d\u7269\u80fd\u5f97\u66f4\u5927\u4f18\u60e0\uff0e\u70b9\u8bc4\uff1a\u672c\u9898\u4e3b\u8981\u8003\u67e5\u5bf9\u4e8e\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\u4ee5\u53ca\u4e00\u5143\u4e00\u6b21\u4e0d\u7b49\u5f0f\u7684\u638c\u63e1\uff0e
7.\u5c0f\u738b\u53bb\u65b0\u534e\u4e66\u5e97\u4e70\u4e66\uff0c\u4e66\u5e97\u89c4\u5b9a\u82b120\u5143\u529e\u4f18\u60e0\u5361\u540e\u8d2d\u4e66\u53ef\u4eab\u53d78.5\u6298\u4f18\u60e0\uff0e\u5c0f\u738b\u529e\u5361\u540e\u8d2d\u4e70\u4e86\u4e00\u4e9b\u4e66\uff0c\u8d2d\u4e66\u4f18\u60e0\u540e\u7684\u4ef7\u683c\u52a0\u4e0a\u529e\u5361\u8d39\u7528\u6bd4\u8fd9\u4e9b\u4e66\u7684\u539f\u4ef7\u8fd8\u5c11\u4e8610\u5143\u94b1\uff0c\u95ee\u5c0f\u738b\u8d2d\u4e70\u8fd9\u4e9b\u4e66\u7684\u539f\u4ef7\u662f\u591a\u5c11\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u7ecf\u6d4e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u529e\u5361\u8d39\u7528\u52a0\u4e0a\u6253\u6298\u540e\u7684\u4e66\u6b3e\u5e94\u8be5\u7b49\u4e8e\u4e66\u7684\u539f\u4ef7\u52a0\u4e0a\u8282\u7701\u4e0b\u6765\u768410\u5143\uff0c\u7531\u6b64\u6570\u91cf\u5173\u7cfb\u53ef\u5217\u65b9\u7a0b\u8fdb\u884c\u89e3\u7b54\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u4e66\u7684\u539f\u4ef7\u4e3ax\u5143\uff0c
\u7531\u9898\u53ef\u5f97\uff1a20+0.85x=x-10\uff0c
\u89e3\u5f97\uff1ax=200\uff0e
\u7b54\uff1a\u5c0f\u738b\u8d2d\u4e70\u8fd9\u4e9b\u4e66\u7684\u539f\u4ef7\u662f200\u5143\uff0e\u70b9\u8bc4\uff1a\u89e3\u9898\u5173\u952e\u662f\u8981\u8bfb\u61c2\u9898\u76ee\u7684\u610f\u601d\uff0c\u628a\u5b9e\u9645\u95ee\u9898\u8f6c\u5316\u6210\u6570\u5b66\u95ee\u9898\uff0c\u7136\u540e\u6839\u636e\u9898\u76ee\u7ed9\u51fa\u7684\u6761\u4ef6\uff0c\u627e\u51fa\u5408\u9002\u7684\u7b49\u91cf\u5173\u7cfb\uff0c\u5217\u51fa\u65b9\u7a0b\u7ec4\uff0c\u518d\u6c42\u89e3
8.A\u3001B\u4e24\u57ce\u94c1\u8def\u957f240\u5343\u7c73\uff0c\u4e3a\u4f7f\u884c\u9a76\u65f6\u95f4\u51cf\u5c1120\u5206\uff0c\u9700\u8981\u63d0\u901f10\u5343\u7c73/\u65f6\uff0c\u4f46\u5728\u73b0\u6709\u6761\u4ef6\u4e0b\u5b89\u5168\u884c\u9a76\u9650\u901f100\u5343\u7c73/\u65f6\uff0c\u95ee\u80fd\u5426\u5b9e\u73b0\u63d0\u901f\u76ee\u6807\uff0e\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u884c\u7a0b\u95ee\u9898\uff0e\u5206\u6790\uff1a\u5728\u63d0\u901f\u524d\u548c\u63d0\u901f\u540e\uff0c\u884c\u8d70\u7684\u8def\u7a0b\u5e76\u6ca1\u6709\u53d1\u751f\u53d8\u5316\uff0c\u7531\u6b64\u53ef\u5217\u65b9\u7a0b\u89e3\u7b54\uff0e\u89e3\u7b54\uff1a\u89e3\u6cd5\u4e00
\u89e3\uff1a\u8bbe\u63d0\u901f\u524d\u901f\u5ea6\u4e3a\u6bcf\u5c0f\u65f6x\u5343\u7c73\uff0c\u5219\u9700\u65f6\u95f4\u4e3a 240x\u5c0f\u65f6\uff0c
\u4f9d\u9898\u610f\u5f97\uff1a\uff08x+10\uff09\uff08 240x- 2060\uff09=240\uff0c
\u89e3\u5f97\uff1ax1=-90\uff08\u820d\u53bb\uff09\uff0cx2=80\uff0c
\u56e0\u4e3a80\uff1c100\uff0c\u6240\u4ee5\u80fd\u5b9e\u73b0\u63d0\u901f\u76ee\u6807\uff0e
\u89e3\u6cd5\u4e8c
\u89e3\uff1a\u8bbe\u63d0\u63d0\u901f\u540e\u884c\u9a76\u4e3ax\u5343\u7c73/\u65f6\uff0c\u6839\u636e\u9898\u610f\uff0c\u5f97 240x-10- 240x= 2060\u53bb\u5206\u6bcd\uff0e
\u6574\u7406\u5f97x2-10x-7200=0\uff0e
\u89e3\u4e4b\u5f97\uff1ax1=90\uff0cx2=-80
\u7ecf\u68c0\u9a8c\uff0cx1=90\uff0cx2=-80\u90fd\u662f\u539f\u65b9\u7a0b\u7684\u6839\uff0e
\u4f46\u901f\u5ea6\u4e3a\u8d1f\u6570\u4e0d\u5408\u9898\u610f\uff0c\u6240\u4ee5\u53ea\u53d6x=90\uff0e
\u7531\u4e8ex=90\uff1c100\uff0e\u6240\u4ee5\u80fd\u5b9e\u73b0\u63d0\u901f\u76ee\u6807\uff0e
9.\u6c34\u6e90\u900f\u652f\u4ee4\u4eba\u62c5\u5fe7\uff0c\u8282\u7ea6\u7528\u6c34\u8feb\u5728\u7709\u776b\uff0c\u9488\u5bf9\u5c45\u6c11\u7528\u6c34\u6d6a\u8d39\u73b0\u8c61\uff0c\u67d0\u57ce\u5e02\u5236\u5b9a\u4e86\u5c45\u6c11\u6bcf\u6708\u6bcf\u6237\u7528\u6c34\u6807\u51c68m3\uff0c\u8d85\u6807\u90e8\u5206\u52a0\u4ef7\u6536\u8d39\uff0c\u67d0\u6237\u5c45\u6c11\u8fde\u7eed\u4e24\u4e2a\u6708\u7684\u7528\u6c34\u548c\u6c34\u8d39\u5206\u522b\u662f12m3\uff0c22\u5143\uff1b10m3\uff0c16.2\u5143\uff0c\u8bd5\u6c42\u8be5\u5e02\u5c45\u6c11\u6807\u51c6\u5185\u7528\u6c34\u6bcf\u7acb\u65b9\u7c73\u6536\u8d39\u662f\u591a\u5c11\uff1f\u8d85\u6807\u90e8\u5206\u6bcf\u7acb\u65b9\u7c73\u6536\u8d39\u662f\u591a\u5c11\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u7ecf\u6d4e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u6807\u51c6\u5185\u7528\u6c34\u6536\u8d39\u52a0\u4e0a\u8d85\u6807\u90e8\u5206\u6536\u8d39\u5c31\u662f\u672c\u6708\u603b\u8d39\u7528\uff0c\u7531\u6b64\u53ef\u5217\u65b9\u7a0b\u7ec4\u8fdb\u884c\u6c42\u89e3\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u6807\u51c6\u5185\u7528\u6c34\u6bcf\u7acb\u65b9\u7c73\u6536\u8d39\u662fx\u5143\uff0c\u8d85\u6807\u90e8\u5206\u6bcf\u7acb\u65b9\u7c73\u6536\u8d39\u662fy\u5143\uff0e
\u7531\u9898\u53ef\u5f97\uff1a8x+\uff0812-8\uff09y=22\uff1b8x+\uff0810-8\uff09y=16.2\uff0c
\u89e3\u5f97\uff1ax=1.3\uff0cy=2.9\uff0e
\u6545\u8be5\u57ce\u5e02\u5c45\u6c11\u6807\u51c6\u5185\u7528\u6c34\u6bcf\u7acb\u65b9\u7c73\u6536\u8d391.3\u5143\uff0c\u8d85\u6807\u90e8\u5206\u6bcf\u7acb\u65b9\u7c73\u6536\u8d392.9\u5143\uff0e
10.\u636e\u67d0\u7edf\u8ba1\u6570\u636e\u663e\u793a\uff0c\u5728\u6211\u56fd\u7684664\u5ea7\u57ce\u5e02\u4e2d\uff0c\u6309\u6c34\u8d44\u6e90\u60c5\u51b5\u53ef\u5206\u4e3a\u4e09\u7c7b\uff1a\u6682\u4e0d\u7f3a\u6c34\u57ce\u5e02\u3001\u4e00\u822c\u7f3a\u6c34\u57ce\u5e02\u548c\u4e25\u91cd\u7f3a\u6c34\u57ce\u5e02\uff0e\u5176\u4e2d\uff0c\u6682\u4e0d\u7f3a\u6c34\u57ce\u5e02\u6570\u6bd4\u4e25\u91cd\u7f3a\u6c34\u57ce\u5e02\u6570\u76844\u500d\u5c1150\u5ea7\uff0c\u4e00\u822c\u7f3a\u6c34\u57ce\u5e02\u6570\u662f\u4e25\u91cd\u7f3a\u6c34\u57ce\u5e02\u6570\u76842\u500d\uff0e\u6c42\u4e25\u91cd\u7f3a\u6c34\u57ce\u5e02\u6709\u591a\u5c11\u5ea7\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u5de5\u7a0b\u95ee\u9898\uff0e\u5206\u6790\uff1a\u672c\u9898\u7684\u7b49\u91cf\u5173\u7cfb\u4e3a\uff1a\u6682\u4e0d\u7f3a\u6c34\u57ce\u5e02+\u4e00\u822c\u7f3a\u6c34\u57ce\u5e02+\u4e25\u91cd\u7f3a\u6c34\u57ce\u5e02=664\uff0c\u636e\u6b64\u5217\u51fa\u65b9\u7a0b\uff0c\u89e3\u53ef\u5f97\u7b54\u6848\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u4e25\u91cd\u7f3a\u6c34\u57ce\u5e02\u6709x\u5ea7\uff0c
\u4f9d\u9898\u610f\u5f97\uff1a\uff084x-50\uff09+x+2x=664\uff0e
\u89e3\u5f97\uff1ax=102\uff0e
\u7b54\uff1a\u4e25\u91cd\u7f3a\u6c34\u57ce\u5e02\u6709102\u5ea7\uff0e
11.\u76ee\u524d\u5e7f\u5dde\u5e02\u5c0f\u5b66\u548c\u521d\u4e2d\u5728\u4efb\u6821\u751f\u5171\u6709\u7ea6128\u4e07\u4eba\uff0c\u5176\u4e2d\u5c0f\u5b66\u751f\u5728\u6821\u4eba\u6570\u6bd4\u521d\u4e2d\u751f\u5728\u6821\u4eba\u6570\u76842\u500d\u591a14\u4e07\u4eba\uff08\u6570\u636e\u6765\u6e90\uff1a2005\u5b66\u5e74\u5ea6\u5e7f\u5dde\u5e02\u6559\u80b2\u7edf\u8ba1\u624b\u518c\uff09\uff0e
\uff081\uff09\u6c42\u76ee\u524d\u5e7f\u5dde\u5e02\u5728\u6821\u7684\u5c0f\u5b66\u751f\u4eba\u6570\u548c\u521d\u4e2d\u751f\u4eba\u6570\uff1b
\uff082\uff09\u5047\u8bbe\u4eca\u5e74\u5c0f\u5b66\u751f\u6bcf\u4eba\u9700\u4ea4\u6742\u8d39500\u5143\uff0c\u521d\u4e2d\u751f\u6bcf\u4eba\u9700\u4ea4\u6742\u8d391000\u5143\uff0c\u800c\u8fd9\u4e9b\u8d39\u7528\u5168\u90e8\u7531\u5e7f\u5dde\u5e02\u653f\u5e9c\u62e8\u6b3e\u89e3\u51b3\uff0c\u5219\u5e7f\u5dde\u5e02\u653f\u5e9c\u8981\u4e3a\u6b64\u62e8\u6b3e\u591a\u5c11\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5de5\u7a0b\u95ee\u9898\uff0e\u5206\u6790\uff1a\uff081\uff09\u672c\u9898\u53ef\u8bbe\u76ee\u524d\u5e7f\u5dde\u5e02\u5728\u6821\u7684\u521d\u4e2d\u751f\u4eba\u6570\u4e3ax\u4e07\uff0c\u56e0\u5e7f\u5dde\u5e02\u5c0f\u5b66\u548c\u521d\u4e2d\u5728\u4efb\u6821\u751f\u5171\u6709\u7ea6128\u4e07\u4eba\uff0c\u5176\u4e2d\u5c0f\u5b66\u751f\u5728\u6821\u4eba\u6570\u6bd4\u521d\u4e2d\u751f\u5728\u6821\u4eba\u6570\u76842\u500d\u591a14\u4e07\u4eba\uff0c\u90a3\u4e48\u5c0f\u5b66\u751f\u4eba\u6570\u4e3a\uff1a\uff082x+14\uff09\u4e07\uff0c\u6240\u4ee5\u53ef\u5217\u65b9\u7a0bx+2x+14=128\uff0c\u89e3\u65b9\u7a0b\u5373\u53ef\uff1b
\uff082\uff09\u5728\uff081\uff09\u7684\u57fa\u7840\u4e0a\u5229\u7528\u201c\u5e7f\u5dde\u5e02\u653f\u5e9c\u7684\u62e8\u6b3e=\u5c0f\u5b66\u751f\u4eba\u6570\u00d7500+\u4e2d\u5b66\u751f\u4eba\u6570\u00d71000\u201d\u5373\u53ef\u6c42\u51fa\u7b54\u6848\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\uff081\uff09\u8bbe\u521d\u4e2d\u751f\u4eba\u6570\u4e3ax\u4e07\uff0c\u90a3\u4e48\u5c0f\u5b66\u751f\u4eba\u6570\u4e3a\uff082x+14\uff09\u4e07\uff0c
\u5219x+2x+14=128
\u89e3\u5f97x=38
\u7b54\uff1a\u521d\u4e2d\u751f\u4eba\u6570\u4e3a38\u4e07\u4eba\uff0c\u5c0f\u5b66\u751f\u4eba\u6570\u4e3a90\u4e07\u4eba\uff0e
\uff082\uff09500\u00d7900 000+1000\u00d7380 000=830 000 000\u5143\uff0c\u53738.3\u4ebf\u5143\uff0e
\u7b54\uff1a\u5e7f\u5dde\u5e02\u653f\u5e9c\u8981\u4e3a\u6b64\u62e8\u6b3e8.3\u4ebf\u5143\uff0e
12.\u5c0f\u660e\u53bb\u6587\u5177\u5e97\u8d2d\u4e702B\u94c5\u7b14\uff0c\u5e97\u4e3b\u8bf4\uff1a\u201c\u5982\u679c\u591a\u4e70\u4e00\u4e9b\uff0c\u7ed9\u4f60\u62538\u6298\u201c\uff0c\u5c0f\u660e\u6d4b\u7b97\u4e86\u4e00\u4e0b\uff0e\u5982\u679c\u4e7050\u652f\uff0c\u6bd4\u6309\u539f\u4ef7\u8d2d\u4e70\u53ef\u4ee5\u4fbf\u5b9c6\u5143\uff0c\u90a3\u4e48\u6bcf\u652f\u94c5\u7b14\u7684\u539f\u4ef7\u662f\u591a\u5c11\u5143\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u7ecf\u6d4e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u7b49\u91cf\u5173\u7cfb\u4e3a\uff1a\u539f\u4ef7\u00d750\u00d7\uff081-80%\uff09=6\uff0e\u7531\u6b64\u53ef\u5217\u51fa\u65b9\u7a0b\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u6bcf\u652f\u94c5\u7b14\u7684\u539f\u4ef7\u4e3ax\u5143\uff0c
\u4f9d\u9898\u610f\u5f97\uff1a50x\uff081-0.8\uff09=6\uff0c
\u89e3\u5f97\uff1ax=0.6\uff0e
\u7b54\uff1a\u6545\u6bcf\u652f\u94c5\u7b14\u7684\u539f\u4ef7\u662f0.6\u5143\uff0e
13.\u521d\u4e09\u67d0\u73ed\u7684\u4e00\u4e2a\u7efc\u5408\u5b9e\u9a8c\u6d3b\u52a8\u5c0f\u7ec4\u53bbA\uff0cB\u4e24\u4e2a\u8f66\u7ad9\u8c03\u67e5\u524d\u5e74\u548c\u53bb\u5e74\u201c\u6625\u8fd0\u201d\u671f\u95f4\u7684\u5ba2\u6d41\u91cf\u60c5\u51b5\uff0c\u5982\u56fe\u662f\u8c03\u67e5\u540e\u5c0f\u660e\u4e0e\u5176\u5b83\u4e24\u4f4d\u540c\u5b66\u8fdb\u884c\u4ea4\u6d41\u7684\u60c5\u666f\uff0c\u6839\u636e\u4ed6\u4eec\u7684\u5bf9\u8bdd\uff0c\u8bf7\u4f60\u5206\u522b\u6c42\u51faA\uff0cB\u4e24\u4e2a\u8f66\u7ad9\u53bb\u5e74\u201c\u6625\u8fd0\u201d\u671f\u95f4\u7684\u5ba2\u6d41\u91cf\uff0e
\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u9605\u8bfb\u578b\uff0e\u5206\u6790\uff1a\u6240\u589e\u52a0\u7684\u767e\u5206\u6bd4\u4e58\u4ee5\u57fa\u6570\u5373\u4e3a\u589e\u52a0\u7684\u5b9e\u9645\u4eba\u6570\uff0c\u7531\u6b64\u53ef\u5217\u65b9\u7a0b\u8fdb\u884c\u89e3\u7b54\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbeA\u7ad9\u524d\u5e74\u201c\u6625\u8fd0\u201d\u671f\u95f4\u7684\u5ba2\u6d41\u91cf\u4e3ax\uff0c\u5219B\u7ad9\u4e3a\uff0820-x\uff09\uff0c
\u7531\u9898\u610f\u77e5\uff1a0.2x+0.1\uff0820-x\uff09=22.5-20\uff0c
\u89e3\u5f97\uff1ax=5
\u2234A\u7ad9\u53bb\u5e74\u5ba2\u6d41\u91cf\u4e3a\uff1a1.2\u00d75=6\uff08\u4e07\u4eba\uff09
\u2234B\u7ad9\u4eba\u6570\u4e3a\uff1a22.5-6=16.5\uff08\u4e07\u4eba\uff09
\u7b54\uff1aA\u7ad9\u53bb\u5e74\u201c\u6625\u8fd0\u201d\u671f\u95f4\u7684\u5ba2\u6d41\u91cf\u4e3a6\u4e07\u4eba\uff0cB\u7ad9\u4e3a16.5\u4e07\u4eba\uff0e
14.\u9605\u8bfb\u4e0b\u9762\u5bf9\u8bdd\uff1a
\u5c0f\u7ea2\u5988\uff1a\u201c\u552e\u8d27\u5458\uff0c\u8bf7\u5e2e\u6211\u4e70\u4e9b\u68a8\uff0e\u201d
\u552e\u8d27\u5458\uff1a\u201c\u5c0f\u7ea2\u5988\uff0c\u60a8\u4e0a\u6b21\u4e70\u7684\u90a3\u79cd\u68a8\u90fd\u5356\u5b8c\u4e86\uff0c\u6211\u4eec\u8fd8\u6ca1\u6765\u5f97\u53ca\u8fdb\u8d27\uff0c\u6211\u5efa\u8bae\u8fd9\u6b21\u60a8\u4e70\u4e9b\u65b0\u8fdb\u7684\u82f9\u679c\uff0c\u4ef7\u683c\u6bd4\u68a8\u8d35\u4e00\u70b9\uff0c\u4e0d\u8fc7\u82f9\u679c\u7684\u8425\u517b\u4ef7\u503c\u66f4\u9ad8\uff0e\u201d
\u5c0f\u7ea2\u5988\uff1a\u201c\u597d\uff0c\u4f60\u4eec\u5f88\u8bb2\u4fe1\u7528\uff0c\u8fd9\u6b21\u6211\u7167\u4e0a\u6b21\u4e00\u6837\uff0c\u4e5f\u82b130\u5143\u94b1\uff0e\u201d
\u5bf9\u7167\u524d\u540e\u4e24\u6b21\u7684\u7535\u8111\u5c0f\u7968\uff0c\u5c0f\u7ea2\u5988\u53d1\u73b0\uff1a\u6bcf\u5343\u514b\u82f9\u679c\u7684\u4ef7\u662f\u68a8\u76841.5\u500d\uff0c\u82f9\u679c\u7684\u91cd\u91cf\u6bd4\u68a8\u8f7b2.5\u5343\u514b\uff0e
\u8bd5\u6839\u636e\u4e0a\u9762\u5bf9\u8bdd\u548c\u5c0f\u7ea2\u5988\u7684\u53d1\u73b0\uff0c\u5206\u522b\u6c42\u51fa\u68a8\u548c\u82f9\u679c\u7684\u5355\u4ef7\uff0e\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u9605\u8bfb\u578b\uff0e\u5206\u6790\uff1a\u8bbe\u6bcf\u5343\u514b\u68a8\u7684\u4ef7\u683c\u662fx\u5143\uff0c\u5219\u6bcf\u5343\u514b\u82f9\u679c\u7684\u4ef7\u683c\u662f1.5x\u5143\uff0e\u6839\u636e\u82f9\u679c\u7684\u91cd\u91cf\u6bd4\u68a8\u8f7b2.5\u5343\u514b\u8fd9\u4e2a\u7b49\u91cf\u5173\u7cfb\u5217\u65b9\u7a0b\u6c42\u89e3\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u6bcf\u5343\u514b\u68a8\u7684\u4ef7\u683c\u662fx\u5143\uff0c\u5219\u6bcf\u5343\u514b\u82f9\u679c\u7684\u4ef7\u683c\u662f1.5x\u5143\uff0e
\u5219\u6709\uff1a 30x=301.5x+2.5\uff0c
\u89e3\u5f97\uff1ax=4\uff0c
1.5x=6\uff0e
\u7b54\uff1a\u68a8\u548c\u82f9\u679c\u7684\u5355\u4ef7\u5206\u522b\u4e3a4\u5143/\u5343\u514b\u548c6\u5143/\u5343\u514b\uff0e
15.\u6211\u6821\u201c\u6625\u4e4b\u58f0\u201d\u5e7f\u64ad\u5ba4\u5c0f\u8bb0\u8005\u8c2d\u8273\u540c\u5b66\u4e3a\u4e86\u53ca\u65f6\u62a5\u9053\u5b66\u6821\u53c2\u52a0\u5168\u5e02\u4e2d\u5b66\u751f\u7bee\u7403\u6bd4\u8d5b\u60c5\u51b5\uff0c\u5979\u4ece\u9886\u961f\u97e6\u8001\u5e08\u90a3\u91cc\u4e86\u89e3\u5230\u6821\u961f\u5171\u53c2\u52a0\u4e8616\u573a\u6bd4\u8d5b\uff0c\u79ef\u520628\u5206\uff0e\u6309\u89c4\u5b9a\u8d62\u4e00\u573a\u5f972\u5206\uff0c\u8f93\u4e00\u573a\u5f971\u5206\uff0e\u53ef\u662f\u5c0f\u8c2d\u5fd8\u8bb0\u4e86\u8f93\u8d62\u5404\u591a\u5c11\u573a\u4e86\uff0c\u8bf7\u4f60\u6839\u636e\u4e0a\u9762\u63d0\u4f9b\u7684\u4fe1\u606f\u5206\u522b\u6c42\u51fa\u8f93\u3001\u8d62\u5404\u591a\u5c11\u573a\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u6bd4\u8d5b\u95ee\u9898\uff0e\u5206\u6790\uff1a\u7403\u961f\u8d62\u7403\u540e\u5f97\u5206\u52a0\u4e0a\u8f93\u7403\u5f97\u5206\u5e94\u8be5\u7b49\u4e8e\u603b\u5f97\u5206\uff0c\u5373\u53ef\u5217\u65b9\u7a0b\u89e3\u5e94\u7528\u9898\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u7403\u961f\u8d62\u4e86x\u573a\uff0c\u5219\u8f93\u4e86\uff0816-x\uff09\u573a\uff0c
\u7531\u9898\u53ef\u5f97\uff1a2x+\uff0816-x\uff09\u00d71=28
\u89e3\u5f97\uff1ax=12\uff0c
\u7b54\uff1a\u7403\u961f\u8d62\u4e8612\u573a\uff0c\u8f93\u4e864\u573a\uff0e
16.\u8054\u60f3\u4e2d\u5b66\u672c\u5b66\u671f\u524d\u4e09\u5468\u6bcf\u5468\u90fd\u7ec4\u7ec7\u521d\u4e09\u5e74\u7ea7\u5b66\u751f\u8fdb\u884c\u4e00\u6b21\u4f53\u80b2\u6d3b\u52a8\uff0c\u5168\u5e74\u7ea7400\u540d\u5b66\u751f\u6bcf\u4eba\u6bcf\u6b21\u90fd\u53ea\u53c2\u52a0\u7403\u7c7b\u6216\u7530\u5f84\u7c7b\u4e2d\u4e00\u4e2a\u9879\u76ee\u7684\u6d3b\u52a8\uff0e\u5047\u8bbe\u6bcf\u6b21\u53c2\u52a0\u7403\u7c7b\u6d3b\u52a8\u7684\u5b66\u751f\u4e2d\uff0c\u4e0b\u6b21\u5c06\u670920%\u6539\u4e3a\u53c2\u52a0\u7530\u5f84\u7c7b\u6d3b\u52a8\uff1b\u540c\u65f6\u6bcf\u6b21\u53c2\u52a0\u7530\u5f84\u7c7b\u6d3b\u52a8\u7684\u5b66\u751f\u4e2d\uff0c\u4e0b\u6b21\u5c06\u670930%\u6539\u4e3a\u53c2\u52a0\u7403\u7c7b\u6d3b\u52a8\uff0e
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\u7b2c\u4e8c\u6b21\u53c2\u52a0\u7403\u7c7b\u6d3b\u52a8\u7684\u5b66\u751f\u4e3ax•\uff081-20%\uff09+\uff08400-x\uff09•30%
\u7531\u9898\u610f\u5f97\uff1ax=x•\uff081-20%\uff09+\uff08400-x\uff09•30%
\u89e3\u4e4b\u5f97\uff1ax=240
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\u2234\u7b2c\u4e09\u6b21\u53c2\u52a0\u7403\u7c7b\u6d3b\u52a8\u7684\u5b66\u751f\u4e3a\uff1a\uff08 x2+120\uff09•\uff081-20%\uff09+[400-\uff08 x2+120\uff09]•30%= x4+180\uff0c
\u2234\u7531 x4+180\u2265200\u5f97x\u226580\uff0c
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17.\u5b66\u6821\u7efc\u5408\u5b9e\u8df5\u6d3b\u52a8\u5c0f\u7ec4\u7684\u540c\u5b66\u4eec\u4e58\u8f66\u5230\u5929\u6c60\u5c71\u519c\u79d1\u6240\u8fdb\u884c\u793e\u4f1a\u8c03\u67e5\uff0c\u53ef\u4f9b\u79df\u7528\u7684\u8f66\u8f86\u6709\u4e24\u79cd\uff1a\u7b2c\u4e00\u79cd\u53ef\u4e588\u4eba\uff0c\u7b2c\u4e8c\u79cd\u53ef\u4e584\u4eba\uff0e\u82e5\u53ea\u79df\u7528\u7b2c\u4e00\u79cd\u8f66\u82e5\u5e72\u8f86\uff0c\u5219\u7a7a4\u4e2a\u5ea7\u4f4d\uff1b\u82e5\u53ea\u79df\u7528\u7b2c\u4e8c\u79cd\u8f66\uff0c\u5219\u6bd4\u79df\u7528\u7b2c\u4e00\u79cd\u8f66\u591a3\u8f86\uff0c\u4e14\u521a\u597d\u5750\u6ee1\uff0e
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\u89e3\u4e4b\u5f97\uff1ax=28
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\u6bd4\u8f83\u540e\u77e5\uff1a\u79df\u7b2c\u4e00\u79cd\u8f663\u8f86\uff0c\u7b2c\u4e8c\u79cd\u8f661\u8f86\u65f6\u8d39\u7528\u6700\u5c11\uff0c
\u5176\u8d39\u7528\u4e3a1100\u5143\uff0e
18.\u67d0\u5c0f\u5e97\u8001\u677f\u4ece\u9762\u5305\u5382\u8d2d\u8fdb\u9762\u5305\u7684\u4ef7\u683c\u662f\u6bcf\u4e2a0.6\u5143\uff0c\u6309\u6bcf\u4e2a\u9762\u53051.0\u5143\u7684\u4ef7\u683c\u51fa\u552e\uff0c\u5356\u4e0d\u5b8c\u7684\u4ee5\u6bcf\u4e2a0.2\u5143\u4e8e\u5f53\u5929\u8fd4\u8fd8\u5382\u5bb6\uff0c\u5728\u4e00\u4e2a\u6708\uff0830\u5929\uff09\u91cc\uff0c\u5c0f\u5e97\u670920\u5929\u5e73\u5747\u6bcf\u5929\u5356\u51fa\u9762\u530580\u4e2a\uff0c\u5176\u4f5910\u5929\u5e73\u5747\u6bcf\u5929\u5356\u51fa\u9762\u530550\u4e2a\uff0c\u8fd9\u6837\u5c0f\u5e97\u8001\u677f\u83b7\u7eaf\u5229600\u5143\uff0c\u5982\u679c\u5c0f\u5e97\u8001\u677f\u6bcf\u5929\u4ece\u9762\u5305\u5382\u8d2d\u8fdb\u76f8\u540c\u6570\u91cf\u7684\u9762\u5305\uff0c\u6c42\u8fd9\u4e2a\u6570\u91cf\u662f\u591a\u5c11\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u7ecf\u6d4e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u7531\u9898\u610f\u5f97\uff0c\u4ed6\u8fdb\u7684\u5305\u5b50\u6570\u91cf\u5e94\u572850-80\u4e4b\u95f4\uff1b\u7b49\u91cf\u5173\u7cfb\u4e3a\uff1a\uff0820\u00d7\u8fdb\u8d27\u91cf+10\u00d750\uff09\u00d7\u6bcf\u4e2a\u7684\u5229\u6da6-\uff08\u8fdb\u8d27\u91cf-50\uff09\u00d710\u00d7\u6bcf\u4e2a\u8d54\u7684\u94b1=600\uff1b\u636e\u6b64\u5217\u51fa\u65b9\u7a0b\u89e3\u53ef\u5f97\u7b54\u6848\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u8fd9\u4e2a\u6570\u91cf\u662fx\u4e2a\uff0e
\u7531\u9898\u610f\u5f97\uff1a\uff0820x+500\uff09\u00d7\uff081-0.6\uff09-\uff08x-50\uff09\u00d710\u00d7\uff080.6-0.2\uff09=600\uff0c
\u89e3\u5f97\uff1ax=50\uff0e
\u6545\u8fd9\u4e2a\u6570\u91cf\u662f50\u4e2a\uff0e
19.\u5c0f\u521a\u5728\u5546\u573a\u53d1\u73b0\u4ed6\u559c\u6b22\u7684\u968f\u8eab\u542c\u548c\u4e66\u5305\u5355\u4ef7\u4e4b\u548c\u662f452\u5143\uff0c\u5e76\u4e14\u968f\u8eab\u542c\u7684\u5355\u4ef7\u6bd4\u4e66\u5305\u5355\u4ef7\u76844\u500d\u5c118\u5143\uff0e\u6c42\u5c0f\u521a\u559c\u6b22\u7684\u968f\u8eab\u542c\u548c\u4e66\u5305\u7684\u5355\u4ef7\uff0e\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u7ecf\u6d4e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u672c\u9898\u7684\u5173\u952e\u8bed\u201c\u968f\u8eab\u542c\u548c\u4e66\u5305\u5355\u4ef7\u4e4b\u548c\u662f452\u5143\uff0c\u5e76\u4e14\u968f\u8eab\u542c\u7684\u5355\u4ef7\u6bd4\u4e66\u5305\u5355\u4ef7\u76844\u500d\u5c118\u5143\u201d\uff0c\u5373\u968f\u8eab\u542c\u7684\u5355\u4ef7=\u4e66\u5305\u5355\u4ef7\u00d74-8\uff0e\u4f9d\u6b64\u7b49\u91cf\u5173\u7cfb\u5217\u65b9\u7a0b\u6c42\u89e3\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u968f\u8eab\u542c\u5355\u4ef7\u4e3ax\u5143\uff0c\u5219\u4e66\u5305\u7684\u5355\u4ef7\u4e3a\uff08452-x\uff09\u5143\uff0c
\u5217\u65b9\u7a0b\u5f97\uff1ax=4\uff08452-x\uff09-8\uff0c
\u89e3\u5f97\uff1ax=360\uff0e
\u5f53x=360\u65f6\uff0c452-x=92\uff0e
20.\uff081\uff09\u4e00\u79cd\u5546\u54c1\u7684\u8fdb\u4ef7\u662f400\u5143\uff0c\u6807\u4ef7\u4e3a600\u5143\uff0c\u6253\u6298\u9500\u552e\u65f6\u7684\u5229\u6da6\u7387\u4e3a5%\uff0c\u90a3\u4e48\uff0c\u6b64\u5546\u54c1\u662f\u6309\u51e0\u6298\u9500\u552e\u7684\uff1f
\uff082\uff09\u67d0\u5316\u80a5\u5382\u53bb\u5e74\u56db\u6708\u4efd\u751f\u4ea7\u5316\u80a5500\u5428\uff0c\u56e0\u7ba1\u7406\u4e0d\u5584\uff0c\u4e94\u6708\u4efd\u7684\u4ea7\u91cf\u51cf\u5c11\u4e8610%\uff0e\u4ece\u516d\u6708\u8d77\u5f3a\u5316\u7ba1\u7406\uff0c\u4ea7\u91cf\u9010\u6708\u4e0a\u5347\uff0c\u4e03\u6708\u4efd\u4ea7\u91cf\u8fbe\u5230648\u5428\uff0e\u90a3\u4e48\u8be5\u5382\u516d\u3001\u4e03\u4e24\u6708\u4ea7\u91cf\u5e73\u5747\u589e\u957f\u7684\u767e\u5206\u7387\u662f\u591a\u5c11\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff1b\u4e00\u5143\u4e8c\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u589e\u957f\u7387\u95ee\u9898\uff1b\u7ecf\u6d4e\u95ee\u9898\uff0e\u5206\u6790\uff1a\uff081\uff09\u8bbe\u6b64\u5546\u54c1\u6309x\u6298\u9500\u552e\uff0c\u6839\u636e\u5546\u54c1\u8fdb\u4ef7\u548c\u6807\u4ef7\u53ca\u5229\u6da6\u95f4\u5173\u7cfb\u53ef\u5f97\u65b9\u7a0b\uff1b
\uff082\uff09\u8bbe\u8be5\u5382\u516d\uff0c\u4e03\u4e24\u6708\u4ea7\u91cf\u5e73\u5747\u589e\u957f\u7684\u767e\u5206\u7387\u4e3ax\uff0c\u6839\u636e\u4ea7\u91cf\u7684\u51cf\u5c11\u548c\u589e\u52a0\u53ef\u5217\u65b9\u7a0b\u6c42\u89e3\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\uff081\uff09\u8bbe\u6b64\u5546\u54c1\u6309x\u6298\u9500\u552e\uff0e
600x=400\uff081+5%\uff09\uff0c
\u53ef\u6c42\u5f97x=0.7\uff0e
\uff082\uff09\u8bbe\u8be5\u5382\u516d\uff0c\u4e03\u4e24\u6708\u4ea7\u91cf\u5e73\u5747\u589e\u957f\u7684\u767e\u5206\u7387\u4e3ax\uff0e
5\u6708\u4ea7\u91cf\u4e3a500\uff081-10%\uff09=450\uff0c\u52196\u6708\u662f450\uff081+x\uff09\uff0c7\u6708\u4e3a450\uff081+x\uff09\uff081+x\uff09=648\uff0e\u5219\uff1a
\uff081+x\uff092= 648450=1.44\uff0c
1+x=1.2\uff0c
x=20%\uff0e
21.\u67d0\u5546\u573a\u51fa\u552e\u67d0\u79cd\u6587\u5177\uff0c\u6bcf\u4ef6\u53ef\u76c8\u52292\u5143\uff0c\u4e3a\u4e86\u652f\u63f4\u8d2b\u56f0\u5c71\u533a\uff0c\u73b0\u5728\u6309\u539f\u552e\u4ef7\u76847\u6298\u51fa\u552e\u7ed9\u4e00\u5c71\u533a\u5b66\u6821\uff0c\u7ed3\u679c\u6bcf\u4ef6\u76c8\u52290.2\u5143\uff08\u76c8\u5229=\u552e\u4ef7-\u8fdb\u8d27\u4ef7\uff09\uff0e\u95ee\u8be5\u6587\u5177\u6bcf\u4ef6\u7684\u8fdb\u8d27\u4ef7\u662f\u591a\u5c11\u5143\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u9500\u552e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u7b49\u91cf\u5173\u7cfb\u4e3a\uff1a\u552e\u4ef7\u76847\u6298-\u8fdb\u4ef7=\u5229\u6da60.2\uff0c\u7ec6\u5316\u4e3a\uff1a\uff08\u8fdb\u4ef7+2\uff09\u00d77\u6298-\u8fdb\u4ef7=\u5229\u6da60.2\uff0c\u4f9d\u6b64\u7b49\u91cf\u5173\u7cfb\u5217\u65b9\u7a0b\u6c42\u89e3\u5373\u53ef\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u8be5\u6587\u5177\u6bcf\u4ef6\u7684\u8fdb\u8d27\u4ef7\u662fx\u5143\uff0c
\u4f9d\u9898\u610f\u5f97\uff1a70%•\uff08x+2\uff09-x=0.2
\u89e3\u5f97\uff1ax=4
\u7b54\uff1a\u8be5\u6587\u5177\u6bcf\u4ef6\u7684\u8fdb\u8d27\u4ef7\u4e3a4\u5143\uff0e
\u8fd1\u5e74\u6765\uff0c\u5b9c\u5bbe\u5e02\u6559\u80b2\u6280\u672f\u88c5\u5907\u6c34\u5e73\u8fc5\u901f\u63d0\u9ad8\uff0c\u7279\u522b\u662f\u4ee5\u8ba1\u7b97\u673a\u4e3a\u6838\u5fc3\u7684\u73b0\u4ee3\u5316\u88c5\u5907\u53d6\u5f97\u4e86\u7a81\u7834\u6027\u53d1\u5c55\uff0c\u4e2d\u5c0f\u5b66\u6bcf\u767e\u4eba\u8ba1\u7b97\u673a\u62e5\u6709\u91cf\u5728\u5168\u7701\u5904\u4e8e\u9886\u5148\u4f4d\u7f6e\uff0c\u5168\u5e02\u4e2d\u5c0f\u5b66\u88c5\u5907\u9886\u5148\u7684\u603b\u53f0\u6570\u75311996\u5e74\u76841040\u53f0\u76f4\u7ebf\u4e0a\u5347\u52302000\u5e74\u768411600\u53f0\uff0c\u82e51997\u52302000\u5e74\u6bcf\u5e74\u6bd4\u4e0a\u4e00\u5e74\u589e\u52a0\u7684\u8ba1\u7b97\u673a\u53f0\u6570\u90fd\u76f8\u540c\uff0c\u6309\u6b64\u901f\u5ea6\u7ee7\u7eed\u589e\u52a0\uff0c\u52302003\u5e74\u5b9c\u5bbe\u5e02\u4e2d\u5c0f\u5b66\u88c5\u5907\u8ba1\u7b97\u673a\u7684\u603b\u53f0\u6570\u662f\u591a\u5c11\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u589e\u957f\u7387\u95ee\u9898\uff0e\u5206\u6790\uff1a\u5e94\u5148\u6839\u636e96\u5e74\u7684\u53f0\u6570+4\u5e74\u4e00\u5171\u589e\u52a0\u7684\u53f0\u6570=2000\u5e74\u7684\u53f0\u6570\uff0c\u6c42\u5f97\u6bcf\u5e74\u7684\u589e\u957f\u91cf\uff0c\u8fdb\u800c\u8ba911600\u52a03\u5e74\u589e\u52a0\u7684\u53f0\u6570\u5373\u4e3a2003\u5e74\u5b9c\u5bbe\u5e02\u4e2d\u5c0f\u5b66\u88c5\u5907\u8ba1\u7b97\u673a\u7684\u603b\u53f0\u6570\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u6bcf\u5e74\u589e\u52a0\u7684\u8ba1\u7b97\u673a\u53f0\u6570\u4e3ax\u53f0\uff0c
\u5219\uff1a1040+\uff082000-1996\uff09x=11600\uff0c
\u89e3\u5f97x=2640\uff0c
\u22342003\u5e74\u5b9c\u5bbe\u5e02\u4e2d\u5c0f\u5b66\u88c5\u5907\u8ba1\u7b97\u673a\u7684\u603b\u53f0\u6570\u4e3a\uff1a11600+\uff082003-2000\uff09\u00d72640=19520\uff08\u53f0\uff09\uff0e
\u7b54\uff1a2003\u5e74\u5b9c\u5bbe\u5e02\u4e2d\u5c0f\u5b66\u88c5\u5907\u8ba1\u7b97\u673a\u7684\u603b\u53f0\u6570\u662f19520\u53f0\uff0e
23.\u67d0\u4f01\u4e1a\u751f\u4ea7\u4e00\u79cd\u4ea7\u54c1\uff0c\u6bcf\u4ef6\u6210\u672c\u4e3a400\u5143\uff0c\u9500\u552e\u4ef7\u4e3a510\u5143\uff0c\u672c\u5b63\u5ea6\u9500\u552e\u4e86m\u4ef6\uff0c\u4e3a\u8fdb\u4e00\u6b65\u6269\u5927\u5e02\u573a\uff0c\u8be5\u4f01\u4e1a\u51b3\u5b9a\u5728\u964d\u4f4e\u9500\u552e\u4ef7\u7684\u540c\u65f6\u964d\u4f4e\u6210\u672c\uff0c\u7ecf\u8fc7\u5e02\u573a\u8c03\u7814\uff0c\u9884\u6d4b\u4e0b\u5b63\u5ea6\u8fd9\u79cd\u4ea7\u54c1\u6bcf\u4ef6\u9500\u552e\u4ef7\u964d\u4f4e4%\uff0c\u9500\u552e\u5c06\u63d0\u9ad810%\uff0c\u8981\u4f7f\u9500\u552e\u5229\u6da6\uff08\u9500\u552e\u5229\u6da6=\u9500\u552e\u4ef7-\u6210\u672c\u4ef7\uff09\u4fdd\u6301\u4e0d\u53d8\uff0c\u8be5\u4ea7\u54c1\u6bcf\u4ef6\u7684\u6210\u672c\u4ef7\u5e94\u964d\u4f4e\u591a\u5c11\u5143\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff1b\u7ecf\u6d4e\u95ee\u9898\uff0e\u5206\u6790\uff1a\u6b64\u9898\u6587\u5b57\u53d9\u8ff0\u91cf\u5927\uff0c\u8981\u5ba1\u6e05\u9898\u76ee\uff0c\u627e\u5230\u7b49\u91cf\u5173\u7cfb\uff1a\u9500\u552e\u5229\u6da6\uff08\u9500\u552e\u5229\u6da6=\u9500\u552e\u4ef7-\u6210\u672c\u4ef7\uff09\u4fdd\u6301\u4e0d\u53d8\uff0c\u8bbe\u8be5\u4ea7\u54c1\u6bcf\u4ef6\u7684\u6210\u672c\u4ef7\u5e94\u964d\u4f4ex\u5143\uff0c\u5219\u6bcf\u4ef6\u4ea7\u54c1\u9500\u552e\u4ef7\u4e3a510\uff081-4%\uff09\u5143\uff0c\u9500\u552e\u4e86\uff081+10%\uff09m\u4ef6\uff0c\u65b0\u9500\u552e\u5229\u6da6\u4e3a[510\uff081-4%\uff09-\uff08400-x\uff09]\u00d7\uff081+10%\uff09m\u5143\uff0c\u539f\u9500\u552e\u5229\u6da6\u4e3a\uff08510-400\uff09m\u5143\uff0c\u5217\u65b9\u7a0b\u5373\u53ef\u89e3\u5f97\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u8be5\u4ea7\u54c1\u6bcf\u4ef6\u7684\u6210\u672c\u4ef7\u5e94\u964d\u4f4ex\u5143\uff0c\u5219\u6839\u636e\u9898\u610f\u5f97
[510\uff081-4%\uff09-\uff08400-x\uff09]\u00d7m\uff081+10%\uff09=m\uff08510-400\uff09\uff0c
\u89e3\u8fd9\u4e2a\u65b9\u7a0b\u5f97x=10.4\uff0e
\u7b54\uff1a\u8be5\u4ea7\u54c1\u6bcf\u4ef6\u7684\u6210\u672c\u4ef7\u5e94\u964d\u4f4e10.4\u5143\uff0e
24.\u4e3a\u4e86\u9f13\u821e\u4e2d\u56fd\u56fd\u5965\u961f\u57282008\u5e74\u5965\u8fd0\u4f1a\u4e0a\u53d6\u5f97\u597d\u6210\u7ee9\uff0c\u66d9\u5149\u4f53\u80b2\u5668\u6750\u5382\u8d60\u9001\u7ed9\u4e2d\u56fd\u56fd\u5965\u961f\u4e00\u6279\u8db3\u7403\uff0e\u82e5\u8db3\u7403\u961f\u6bcf\u4eba\u9886\u4e00\u4e2a\u5219\u5c116\u4e2a\u7403\uff0c\u6bcf\u4e8c\u4eba\u9886\u4e00\u4e2a\u5219\u4f596\u4e2a\u7403\uff0c\u95ee\u8fd9\u6279\u8db3\u7403\u5171\u6709\u591a\u5c11\u4e2a\uff1f
\u67d0\u961f\u5458\u9886\u5230\u8db3\u7403\u540e\u5341\u5206\u9ad8\u5174\uff0c\u5c31\u4ed4\u7ec6\u7814\u7a76\u8d77\u8db3\u7403\u4e0a\u7684\u9ed1\u767d\u5757\uff08\u5982\u56fe\uff09\uff0c\u7ed3\u679c\u53d1\u73b0\uff0c\u9ed1\u5757\u5448\u4e94\u8fb9\u5f62\uff0c\u767d\u5757\u5448\u516d\u8fb9\u5f62\uff0c\u9ed1\u767d\u76f8\u95f4\u5728\u7403\u4f53\u4e0a\uff0c\u9ed1\u5757\u517112\u5757\uff0c\u95ee\u767d\u5757\u6709\u591a\u5c11\u5757\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5e94\u7528\u9898\uff0e\u5206\u6790\uff1a\uff081\uff09\u6839\u636e\u9898\u610f\u53ef\u77e5\u672c\u9898\u4e2d\u6709\u4e24\u4e2a\u4e0d\u53d8\u7684\u91cf\uff0c\u8db3\u7403\u603b\u6570\u548c\u603b\u4eba\u6570\uff0c\u8981\u6c42\u7684\u662f\u8db3\u7403\u6570\uff0c\u6240\u4ee5\u7b2c\u4e00\u95ee\u7528\u603b\u4eba\u6570\u4f5c\u4e3a\u76f8\u7b49\u5173\u7cfb\u5217\u65b9\u7a0b\u5373\u53ef\uff1b
\uff082\uff09\u7b2c\u4e8c\u95ee\u53ef\u5229\u7528\u9ed1\u5757\u4e0e\u767d\u5757\u7684\u6570\u91cf\u6bd4\u662f3\uff1a5\u7684\u5173\u7cfb\u5217\u65b9\u7a0b\u53ef\u6c42\u89e3\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\uff081\uff09\u8bbe\u6709x\u4e2a\u8db3\u7403\uff0c
\u5219\u6709\uff1ax+6=2\uff08x-6\uff09\uff0c
\u2234x=18\uff1b
\u6240\u4ee5\u8fd9\u6279\u8db3\u7403\u5171\u670918\u4e2a\uff1b
\uff082\uff09\u8bbe\u767d\u5757\u6709y\u5757\uff0c
\u52193y=5\u00d712\uff0c
\u2234y=20\uff0c
\u6240\u4ee5\u767d\u5757\u670920\u5757\uff0e
25.3\u670812\u65e5\u662f\u690d\u6811\u8282\uff0c\u4e03\u5e74\u7ea7170\u540d\u5b66\u751f\u53c2\u52a0\u4e49\u52a1\u690d\u6811\u6d3b\u52a8\uff0c\u5982\u679c\u7537\u751f\u5e73\u5747\u4e00\u5929\u80fd\u6316\u6811\u57513\u4e2a\uff0c\u5973\u751f\u5e73\u5747\u4e00\u5929\u80fd\u79cd\u68117\u68f5\uff0c\u6b63\u597d\u4f7f\u6bcf\u4e2a\u6811\u5751\u79cd\u4e0a\u4e00\u68f5\u6811\uff0c\u95ee\u8be5\u5e74\u7ea7\u7684\u7537\u5973\u751f\u5404\u591a\u5c11\u4eba\uff1f\u8003\u70b9\uff1a\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u5e94\u7528\uff0e\u4e13\u9898\uff1a\u5de5\u7a0b\u95ee\u9898\uff0e\u5206\u6790\uff1a\u8bbe\u8be5\u5e74\u7ea7\u7684\u7537\u751f\u6709x\u4eba\uff0c\u90a3\u4e48\u5973\u751f\u6709\uff08170-x\uff09\u4eba\uff0c\u6240\u4ee5\u7537\u751f\u5e73\u5747\u4e00\u5929\u80fd\u6316\u6811\u57513x\u4e2a\uff0c\u5973\u751f\u5973\u751f\u5e73\u5747\u4e00\u5929\u80fd\u79cd\u68117\uff08170-x\uff09\u68f5\uff0c\u7136\u540e\u6839\u636e\u6bcf\u4e2a\u6811\u5751\u79cd\u4e0a\u4e00\u68f5\u6811\u5373\u53ef\u5217\u51fa\u65b9\u7a0b\u89e3\u51b3\u95ee\u9898\uff0e\u89e3\u7b54\uff1a\u89e3\uff1a\u8bbe\u8be5\u5e74\u7ea7\u7684\u7537\u751f\u6709x\u4eba\uff0c\u90a3\u4e48\u5973\u751f\u6709\uff08170-x\uff09\u4eba\uff0c
\u4f9d\u9898\u610f\u5f97\uff1a3x=7\uff08170-x\uff09\uff0c
\u89e3\u5f97\uff1ax=119\uff0c
170-x=51\uff0e
\u7b54\uff1a\u8be5\u5e74\u7ea7\u7684\u7537\u751f\u6709119\u4eba\uff0c\u90a3\u4e48\u5973\u751f\u670951\u4eba\uff0e
\u671b\u91c7\u7eb3\u8c22\u8c22\u3002
解：因为(m-2)x的|m|-1次方=1是一元一次方程
故：|m|-1=1，且m-2≠0
故：m=±2，且m≠2
故：m=-2
2.
小明和小华今年的年龄分别是25岁和9岁,什么时候小明的年龄是小华年龄的2倍?
解：设x年后，小明的年龄是小华年龄的2倍
因为x年后，小明的年龄是(x+25)岁，小华的年龄是(x+9)岁
故：x+25=2(x+9)
故：x=7
故：7年后，小明的年龄是小华年龄的2倍
3.
已知方程2ax+1=-3和方程5x=10的解相同,求a
解：因为5x=10
故：x=2
因为方程2ax+1=-3和方程5x=10的解相同
即：x=2也是方程2ax+1=-3的解
故：4a+1=-3
故：a=-1
4。有人说：“任何7个连续整数中一定有质数．”请你举一个例子，说明这句话是错的．
【分析与解】
例如连续的7个整数：842、843、844、845、846、847、848分别能被2、3、4、5、6、7、8整除，电就是说它们都不是质数．
评注：有些同学可能会说这是怎么找出来的，翻质数表还是……，我们注意到(n+1)!+2，(n+1)!+3，(n+1)!+4，…，(n+1)!+(n+1)这n个数分别能被2、3、4、…、(n+1)整除，它们是连续的n个合数．
其中n!表示从1一直乘到n的积，即1×2×3×…×n．
5、从小到大写出5个质数，使后面的数都比前面的数大12．
【分析与解】
我们知道12是2、3的倍数，如果开始的质数是2或3，那么
即
与12的和一定也是2或3的倍数，将是合数，所以从5开始尝试．
有5、17、29、41、53是满足条件的5个质数．
6．9个连续的自然数，它们都大于80，那么其中质数最多有多少个?
【分析与解】
大于80的自然数中只要是偶数一定不是质数，于是奇数越多越好，9个连续的自然数中最多只有5个奇数，它们的个位应该为1，3，5，7，9．但是大于80且个位为5的数一定不是质数，所以最多只有4个数．
验证101，102，103，104，105，106，107，108，109这9个连续的自然数中101、103、107、109这4个数均是质数．
也就是大于80的9个连续自然数，其中质数最多能有4个．
一共六道，看看行不？
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