急需!!!二元一次方程组练习题N道(并且带答案谢谢`) 初一二元一次方程组简单练习题50道带答案摆脱，急
\u6c42\u4e8c\u5143\u4e00\u6b21\u65b9\u7a0b\u7ec4\u7ec3\u4e60\u9898N\u9053\uff0c\u5e26\u8fc7\u7a0b\u76841\uff0e\u7532\u4e59\u4e8c\u4eba\u5404\u6709\u4e66\u82e5\u5e72\u672c\uff0c\u5982\u679c\u7532\u9001\u4e5910\u672c\uff0c\u90a3\u4e48\u4e8c\u4eba\u6570\u76f8\u7b49\uff0c\u5982\u679c\u4e59\u9001\u753210\u672c\uff0c\u90a3\u4e48\u7532\u7684\u4e66\u5c31\u662f\u4e59\u7684\u4e66\u76842\u500d\uff0c\u95ee\u5404\u6709\u591a\u5c11\u672c\u4e66
\u89e3\uff1a\u7532x\u4e59y
x\uff0d10\uff1dy\uff0b10
2\uff08y\uff0d10\uff09\uff1dx\uff0b10
x\uff1d70\uff0cy\uff1d50
2\uff0e\u7532\u4e59\u4e24\u5730\u76f8\u8ddd21\u5343\u7c73\uff0c\u5982\u679c\u76f8\u5411\u800c\u884c1\u5c0f\u65f6\u76f8\u9047\uff0c\u5982\u679c\u540c\u5411\u800c\u884c7\u5c0f\u65f6\u4e59\u8ffd\u4e0a\u7532\u3002\u95ee\u7532\u4e59\u901f\u5ea6
\u89e3\uff1a\u7532xkm\uff0fh\uff0c\u4e59y
\uff08x\uff0by\uff09\uff1d21
7\uff08y\uff0dx\uff09\uff1d21
x\uff1d9\uff0cy\uff1d12
3.\u4e00\u4e2a\u957f\u65b9\u5f62\uff0c\u628a\u957f\u51cf\u5c113cm\u5bbd\u589e\u52a02cm\u5c31\u6210\u4e86\u6b63\u65b9\u5f62\uff0c\u4e142\u56fe\u5f62\u9762\u79ef\u76f8\u7b49\uff0c\u7403\u957f\u548c\u5bbd\u3002
\u89e3\uff1a\u957fx\u5bbdy
x\uff0d3\uff1dy\uff0b2
xy\uff1d\uff08x\uff0d3\uff09\uff08y\uff0b2\uff09
x\uff1d9\uff0cy\uff1d4
4\uff0e4\u8f86\u5c0f\u8f66\u548c5\u8f86\u5927\u8f66\u5ba2\u8fd0\u8d27\u726927t\uff0c6\u8f86\u5c0f\u8f66\u548c10\u8f86\u5927\u8f66\u5ba2\u8fd0\u8d27\u726951t\uff0e\u5927\u8f66\u5c0f\u8f66\u6bcf\u8f86\u5206\u522b\u53ef\u4ee5\u4e91\u8d27\u7269\u591a\u5c11t\uff1f
\u89e3\uff1a\u5927x\u5c0fy
4x\uff0b5y\uff1d27
6x\uff0b10y\uff1d51
x\uff1d1\uff0e5\uff0cy\uff1d4\uff0e5
5\uff0e150\u4eba\u8003\u8bd5\uff0c\u5e73\u5747\u520655\uff0c\u53ca\u683c\u751f\u5e73\u5747\u520677\uff0c\u4e0d\u53ca\u683c\u7684\u5e73\u5747\u520647\u3002\u95ee\u53ca\u683c\u5e03\u51e0\u4e2a\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u89e3\uff1a\u53ca\u683cx\u4e0d\u53ca\u683cy
x\uff0by\uff1d150
77x\uff0b47y\uff1d55\uff0a150
x\uff1d110\uff0cy\uff1d40
6.\u8f66\u95f4\u5171\u670990\u4eba\uff0c\u4e00\u5929\u6bcf\u4eba\u53ef\u505a12\u4e2a\u7532\u96f6\u4ef6\u621615\u4e2a\u4e59\u96f6\u4ef6\uff0c\u600e\u6837\u5b89\u6392\u624d\u53ef\u8ba9\u96f6\u4ef6\u6b63\u597d\u914d\u5957\uff081\u7532\u914d1\u4e59\uff09
\u89e3\uff1ax\u4eba\u505a\u7532y\u4eba\u505a\u4e59
x\uff0by\uff1d90
12x\uff1d15y
x\uff1d50\uff0cy\uff1d40
7\uff0e\u6bcf3m\u5e03\u6599\u53ef\u4ee5\u505a\u4e0a\u88632\u4ef6\u6216\u88e4\u5b503\u6761\uff0c\u95ee600\u7c73\u5e03\u6599\u53ef\u4ee5\u505a\u51e0\u5957\uff1f\uff081\u88631\u88e41\u5957\uff09
\u89e3\uff1a\u8bbe\u505ax\u4ef6\u4e0a\u8863y\u4ef6\u88e4\u5b50
x\uff1dy
3\uff0f2x\uff0by\uff1d600
x\uff1d240\uff0cy\uff1d240\u53ef\u505a240\u5957
8.\u5317\u4eac\u548c\u4e0a\u6d77\u90fd\u6709\u67d0\u79cd\u4eea\u5668\u53ef\u4f9b\u5916\u5730\u4f7f\u7528\uff0c\u5176\u4e2d\u5317\u4eac\u53ef\u63d0\u4f9b10\u53f0\uff0c\u4e0a\u6d77\u53ef\u63d0\u4f9b4\u53f0\uff0c\u5df2\u77e5\u91cd\u5e86\u9700\u89818\u53f0\uff0c\u6b66\u6c49\u9700\u89816\u53f0\uff0c\u4ece\u5317\u4eac\u3001\u4e0a\u6d77\u5c06\u4eea\u5668\u8fd0\u5f80\u91cd\u5e86\u3001\u6b66\u6c49\u7684\u8d39\u7528\u5982\u4e0b\u8868\u6240\u793a\uff0c\u6709\u5173\u90e8\u95e8\u8ba1\u5212\u75288000\u5143\u8fd0\u9001\u8fd9\u4e9b\u4eea\u5668\uff0e\u8bf7\u4f60\u8bbe\u8ba1\u4e00\u79cd\u65b9\u6848\uff0c\u4f7f\u6b66\u6c49\u3001\u91cd\u5e86\u80fd\u5f97\u5230\u6240\u9700\u7684\u4eea\u5668\uff0c\u800c\u4e14\u8fd0\u8d39\u6b63\u597d\u591f\u7528\uff0c\u53c8\u80fd\u5426\u4fee\u6539\u65b9\u6848\uff0c\u964d\u4f4e\u6574\u4e2a\u8fd0\u8d39\uff1f
\u6b66\u6c49 \u91cd\u5e86
\u5317\u4eac 400 800
\u4e0a\u6d77 300 500
\u89e3\uff1a\u8bbe\u5317\u4eac\u8fd0\u5f80\u6b66\u6c49x\u53f0\uff0c\u4e0a\u6d77\u8fd0\u6b66\u6c49y\u53f0\uff0c\u7531\u9898\u610f\u5f97
x\uff0by\uff1d6
400x\uff0b800\uff0810\uff0dx\uff09\uff0b300y\uff0b500\uff084\uff0dy\uff09\uff1d8000
x\uff1d4\uff0cy\uff1d2
\u5373\u5317\u4eac\u8fd0\u5f80\u6b66\u6c494\u53f0\uff0c\u8fd0\u5f80\u91cd\u5e866\u53f0\uff0c\u4e0a\u6d77\u8fd0\u5f80\u6b66\u6c492\u53f0\uff0c\u8fd0\u5f80\u91cd\u5e862\u53f0\uff0e\u4ece\u8fd0\u8d39\u8868\u4e2d\u53ef\u4ee5\u770b\u51fa\u5317\u4eac\u8fd0\u5f80\u91cd\u5e86\u7684\u5355\u4f4d\u8fd0\u8d39\u6700\u9ad8\uff0c\u8003\u8651\u8fd0\u8d39\u51cf\u5c11\u5317\u4eac\u8fd0\u5f80\u91cd\u5e86\u7684\u53f0\u6570\uff0c\u5982\u5317\u4eac\u8fd0\u5f80\u91cd\u5e86\u7684\u53f0\u6570\u51cf\u5c11\u4e3a5\u53f0\uff0c\u6b64\u65f6\uff0c\u603b\u8fd0\u8d39\u4e3a
400\u00d75\uff0b800\u00d75\uff0b300\uff0b500\u00d73=7800\uff0c\u6bd4\u539f\u6765\u964d\u4f4e\u4e86200\u5143\uff0c\u8fd8\u53ef\u4ee5\u4f5c\u9002\u5f53\u8c03\u6574\uff0c\u7ee7\u7eed\u964d\u4f4e\u603b\u8fd0\u8d39\uff0e
10\uff0e\u5b66\u6821\u56fe\u4e66\u9986\u642c\u8fc1\uff0c\u516b\u5e74\u7ea7(3)\u73ed\u5b66\u751f\u53c2\u52a0\u4e86\u642c\u8fc1\u56fe\u4e66\u4e0e\u6574\u7406\u56fe\u4e66\u7684\u4efb\u52a1\uff0c\u5f00\u59cb\u65f6\uff0c\u53c2\u52a0\u642c\u8fd0\u56fe\u4e66\u7684\u4eba\u6570\u6bd4\u6574\u7406\u56fe\u4e66\u7684\u4eba\u6570\u76842\u500d\u5c114\u4eba\uff1b\u540e\u6765\uff0c\u4ece\u642c\u8fd0\u56fe\u4e66\u7684\u540c\u5b66\u4e2d\u8c03\u51fa4\u4eba\u53c2\u52a0\u6574\u7406\u56fe\u4e66\u5de5\u4f5c\uff0c\u8fd9\u65f6\u4e24\u90e8\u5206\u4eba\u6570\u76f8\u7b49\uff0c\u6c42\u642c\u4e66\u3001\u6574\u4e66\u5404\u591a\u5c11\u4eba\u3002
\u8bbe\u53c2\u52a0\u642c\u8fd0\u56fe\u4e66\u3001\u6574\u7406\u56fe\u4e66\u7684\u4eba\u6570\u5206\u522b\u4e3ax\uff0cy
x\uff0d2y\uff1d\uff0d4
x\uff0dy\uff1d8
x\uff1d20\uff0cy\uff1d12
\u4e0d\u7b49\u5f0f\u7ec4:1\u3001\u5728\u5bb9\u5668\u91cc\u670918\u6444\u793a\u5ea6\u7684\u6c346\u7acb\u65b9\u7c73\uff0c\u73b0\u5728\u8981\u628a8\u7acb\u65b9\u7c73\u7684\u6c34\u6ce8\u5165\u91cc\u9762\uff0c\u4f7f\u5bb9\u5668\u91cc\u6df7\u5408\u7684\u6c34\u7684\u6e29\u5ea6\u4e0d\u4f4e\u4e8e30\u6444\u793a\u5ea6\uff0c\u4e14\u4e0d\u9ad8\u4e8e36\u6444\u793a\u5ea6\uff0c\u6c42\u6ce8\u5165\u76848\u7acb\u65b9\u7c73\u7684\u6c34\u7684\u6e29\u5ea6\u5e94\u8be5\u5728\u4ec0\u4e48\u8303\u56f4\uff1f
\u8bbe\u6ce8\u5165\u6c34\u6c34\u6e29\u4e3aX
(18*6+X*8)/(6+8)<36
(18*6+X*8)/(6+8)>30
2\u3001\u6709\u7ea2\u3001\u767d\u989c\u8272\u7684\u7403\u82e5\u5e72\u4e2a\uff0c\u5df2\u77e5\u767d\u7403\u7684\u4e2a\u6570\u6bd4\u7ea2\u7403\u5c11\uff0c\u4f46\u767d\u7403\u7684\u4e24\u500d\u6bd4\u7ea2\u7403\u591a\uff0c\u82e5\u628a\u6bcf\u4e00\u4e2a\u767d\u7403\u90fd\u8bb0\u4f5c\u65702\uff0c\u6bcf\u4e00\u4e2a\u7ea2\u7403\u90fd\u8bb0\u4f5c\u65703\uff0c\u5219\u603b\u6570\u4e3a60\uff0c\u6c42\u767d\u7403\u548c\u7ea2\u7403\u5404\u51e0\u4e2a\uff1f
\u8bbe\u7ea2\u7403\u6709X\u4e2a\uff0c\u767d\u7403\u6709Y\u4e2a
Y<X
2Y>X
3X+2Y=60
3\u3001\u4e00\u6b21\u8003\u8bd5\u5171\u670925\u9053\u9009\u62e9\u9898\uff0c\u505a\u5bf9\u4e00\u9898\u5f974\u5206\uff0c\u505a\u9519\u4e00\u9898\u51cf2\u5206\uff0c\u4e0d\u505a\u5f970\u5206\uff0c\u82e5\u5c0f\u660e\u60f3\u786e\u4fdd\u8003\u8bd5\u6210\u7ee9\u572860\u5206\u4ee5\u4e0a\uff0c\u90a3\u4e48\uff0c\u4ed6\u81f3\u5c11\u505a\u5bf9X\u9898\uff0c\u5e94\u6ee1\u8db3\u7684\u4e0d\u7b49\u5f0f\u662f\u4ec0\u4e48\uff1f
\u8bbe\u4f5c\u5bf9x\u9898,\u90a3\u4e48\u505a\u9519\u6216\u8005\u4e0d\u505a\u4e8625-x\u9898 4x -(25-x) =80 x=21
4\u3001\u67d0\u5bbe\u9986\u4e00\u697c\u5ba2\u623f\u6bd4\u4e8c\u697c\u5c115\u95f4\uff0c\u67d0\u65c5\u6e38\u56e2\u670948\u4eba\uff0c\u82e5\u5168\u90e8\u5b89\u6392\u5728\u4e00\u697c\uff0c\u6bcf\u95f44\u4eba\uff0c\u623f\u95f4\u4e0d\u591f\uff0c\u6bcf\u95f45\u4eba\uff0c\u623f\u95f4\u6ca1\u6709\u4f4f\u6ee1\uff1b\u82e5\u5b89\u6392\u4f4f\u5728\u4e8c\u697c\uff0c\u6bcf\u95f43\u4eba\u623f\u95f4\u4e0d\u591f\uff0c\u6bcf\u95f44\u4eba\uff0c\u6709\u623f\u95f4\u6ca1\u4f4f\u6ee1\uff0c\u95ee\u5bbe\u9986\u4e00\u697c\u6709\u5ba2\u623f\u51e0\u95f4
\u8bbe\u4e00\u697cx\u95f4 \u4e8c\u697cy\u95f4
\u5219\uff1a4x48
9+3/5<x<12.....\u6545 x=10\u621611
3y48
12<y<16.....\u6545 y=13,14,15
\u53c8 x=y-5
\u6545 x=10 .y=15
5\u628a\u4e00\u4e9b\u4e66\u5206\u7ed9\u51e0\u4e2a\u5b66\u751f\uff0c\u5982\u679c\u6bcf\u4eba\u52063\u672c\uff0c\u90a3\u4e48\u4f598\u672c\uff1b\u5982\u679c\u524d\u9762\u7684\u6bcf\u4e2a\u5b66\u751f\u52065\u672c\uff0c\u90a3\u4e48\u6700\u540e\u4e00\u4eba\u5c31\u5206\u4e0d\u52303\u672c. \u8bf7\u95ee\u8fd9\u4e9b\u4e66\u6709\u591a\u5c11\u672c\uff1f\u5b66\u751f\u6709\u591a\u5c11\u4eba
\u8bbe\u6709\u5b66\u751fX\u4eba
3X+8\u2264[X-1]\u00d75+2 X\u22655.5 \u5373\u5171\u6709\u5b66\u751f6\u4eba\uff0c\u672c\u5b50\u6709\uff1a3\u00d76+8=26
6.\u5e7c\u513f\u56ed\u51e0\u4e2a\u5c0f\u5b69\u5206\u4e00\u7bb1\u82f9\u679c\uff0c\u5982\u679c\u6bcf\u4eba\u52063\u4e2a\uff0c\u90a3\u4e48\u4f597\u4e2a\uff1b\u5982\u679c\u6bcf\u4eba\u52065\u4e2a\uff0c\u90a3\u4e48\u67091\u4eba\u5206\u5f97\u5f97\u82f9\u679c\u4e0d\u8db35\u4e2a\uff0c\u95ee\u6709\u591a\u5c11\u5c0f\u5b69\uff1f\u591a\u5c11\u82f9\u679c
\u8bbe\u6709X\u4e2a\u5c0f\u5b69,\u6709(3X+7)\u4e2a\u82f9\u679c.
5\uff08x-1\uff09\u22643x+7<5x
\u89e3\u5f97\uff1a3.5\u2264X\u22645.5
\u5219X=4\u6216X=5
\u5f53X=4,3X+7=19;
\u5f53X=5, 3X+7=22;
\u67094\u4e2a\u5c0f\u5b69,19\u4e2a\u82f9\u679c;\u6216\u67095\u4e2a\u5c0f\u5b69,22\u4e2a\u82f9\u679c.
7\u5c0f\u653e\u5bb6\u6bcf\u6708\u6c34\u8d39\u4e0d\u5c11\u4e8e15\u5143,\u81ea\u6765\u6c34\u516c\u53f8\u89c4\u5b9a:\u82e5\u6bcf\u6237\u6bcf\u6708\u7528\u6c34\u4e0d\u8d85\u8fc75\u7acb\u65b9\u7c73,\u5219\u6bcf\u7acb\u65b9\u7c73\u65361\u30018\u5143\uff0c\u82e5\u6bcf\u6237\u6bcf\u6708\u7528\u6c34\u8d85\u8fc75\u7acb\u65b9\u7c73\uff0c\u5219\u8d85\u51fa\u90e8\u5206\u6bcf\u7acb\u65b9\u7c732\u5143\uff0c\u5c0f\u653e\u5bb6\u7528\u6c34\u81f3\u5c11\u662f\u591a\u5c11
\u8bbe\u81f3\u5c11\u662fx\u7acb\u65b9\u7c73
1.2\u00d75+2\uff08x-5\uff09\u2265156+2x-10\u226515x\u22659.5 \u81f3\u5c11\u662f9.5\u7acb\u65b9\u7c73
8\u7528\u6bcf\u5206\u65f6\u95f4\u53ef\u62bd1.1\u5428\u6c34\u7684A\u578b\u62bd\u6c34\u673a\u6765\u62bd\u6c60\u6c34,\u534a\u5c0f\u65f6\u53ef\u4ee5\u62bd\u5b8c\uff0c\u5982\u679c\u7528B\u578b\u62bd\u6c34\u673a\uff0c\u4f30\u8ba120\u5206\u81f322\u5206\u53ef\u4ee5\u62bd\u5b8c.B\u578b\u62bd\u6c34\u673a\u6bd4A\u578b\u62bd\u6c34\u673a\u6bcf\u5206\u949f\u7ea6\u591a\u62bd\u591a\u5c11\u5428\u6c34\uff1f
\u8bbeB\u578b\u6bd4A\u578b\u6bcf\u5206\u7ea6\u591a\u62bdx\u5428\u6c34.
20(1.1+x)<30*1.1 \u2474
22(1.1+x)>30*1.1 \u2475
\u7531\u2474\u5f97:x<0.55
\u7531\u2475\u5f97:x>0.4
\u2234\u4e0d\u7b49\u5f0f\u7ec4\u7684\u89e3\u96c6\u4e3a0.55>x>0.4
9.\u4e03\u5e74\u7ea7\u6709\u5b66\u751f530\u540d\uff0c\u5176\u4e2d\u67091/9\u7684\u7537\u751f\u548c20\u540d\u5973\u751f\u62a5\u540d\u53c2\u52a0\u4f53\u80b2\u6bd4\uff0c\u5176\u4f59\u7684\u5b66\u751f\u4e2d\u7537\u3001\u5973\u751f\u4eba\u6570\u76f8\u7b49\uff0c\u4e03\u5e74\u7ea7\u7537\u3001\u5973\u751f\u4e2a\u591a\u5c11\u540d\uff1f
\u8bbe\u6709\u7537\u751fx\u540d\uff0c\u5973\u751f\u6709y\u540d
\u5219 x+y=530
x-x/9=y-20
\u89e3\u5f97 x=270
y=260
10\u7528\u82e5\u5e72\u8f86\u91cd\u91cf\u4e3a8\u5428\u7684\u6c7d\u8f66\u8fd0\u4e00\u6279\u8d27\u7269\uff0c\u82e5\u6bcf\u8f86\u8f66\u4e4b\u88c54\u5428\uff0c\u5219\u5269\u4e0b20\u5428\u8d27\u7269\uff1b\u82e5\u6ca1\u4eae\u7740\u88c5\u6ee18\u5428\uff0c\u5219\u6700\u540e\u4e00\u8f86\u8f66\u4e0d\u6ee1\u4e5f\u4e0d\u7a7a\uff0c\u95ee:\u6709\u591a\u5c11\u8f86\u8f66\uff1f
\u8bbe\u603b\u5171x\u8f86\u8f66\uff0c\u5219\u603b\u5171\u6709\u8d274x+20\u5428
8x>4x+20
x>5
4x+20>8(x-1)
x<7
5<x<7\u3002\u800cx\u53c8\u662f\u6574\u6570\uff0c\u6240\u4ee5x=6
11\u521d\u4e8c\u5e74\u7ea7\u79cb\u6e38,\u82e5\u79df\u752848\u5ea7\u5ba2\u8f66\u82e5\u5e72\u8f86,\u5219\u6b63\u597d\u5750\u6ee1;\u82e5\u79df\u752864\u5ea7\u5ba2\u8f66,\u5219\u80fd\u5c11\u79df\u4e00\u8f86,\u4e14\u6709\u4e00\u8f86\u8f66\u6bcf\u6709\u5ea7\u6ee1,\u4f46\u8d85\u8fc7\u4e00\u534a.\u4e00\u76f4\u79df\u752848\u5ea7\u5ba2\u8f66\u6bcf\u8f86250\u5143,\u79df\u752864\u5ea7\u5ba2\u8f66\u6bcf\u8f86300\u5143,\u95ee\u5e94\u79df\u7528\u54ea\u79cd\u5ba2\u8f66\u8f83\u5408\u7b97?
\u8bbe\u79df\u752864\u5ea7\u5ba2\u8f66X\u8f86\uff0c\u79df\u752848\u5ea7\u5ba2\u8f66\uff08X+1\uff09\u8f86
64X\uff0d48\uff08X\uff0b1\uff09\uff1e64\u00f72
64X\uff0d48\uff08X\uff0b1\uff09\uff1c6
\u89e3\u5f975\uff1cX\uff1c7
\u79df\u752864\u5ea7\u5ba2\u8f666\u8f86300\u00d76\uff1d1800\u5143250\u00d77\uff1d1750\u5143\u5e94\u79df\u752848\u5ea7\u5ba2\u8f66\u5ba2\u8f66\u8f83\u5408\u7b97
12 \u5c06\u82e5\u5e72\u53ea\u9e21\u653e\u5165\u82e5\u5e72\u4e2a\u7b3c\uff0c\u82e5\u6bcf\u4e2a\u7b3c\u91cc\u653e4\u53ea\uff0c\u5219\u6709\u4e00\u53ea\u9e21\u65e0\u7b3c\u53ef\u653e\uff1b\u82e5\u6bcf\u4e2a\u7b3c\u91cc\u653e5\u53ea\uff0c\u5219\u6709\u4e00\u7b3c\u65e0\u9e21\u53ef\u653e\uff0c\u90a3\u4e48\u81f3\u5c11\u6709\u51e0\u53ea\u9e21\u51e0\u4e2a\u7b3c\uff1f
\u6709X\u4e2a\u7b3c\u3002
4X+1=5\uff08x-1)
4x+1=5x-5
4x-5x=-5-1
x=6
\u22344X+1=4x6+1=25
13\u7532\u3001\u4e59\u4e24\u8f66\u95f4\u5404\u6709\u82e5\u5e72\u4e2a\u5de5\u4eba\u751f\u4ea7\u540c\u4e00\u79cd\u96f6\u4ef6\uff0c\u7532\u8f66\u95f4\u67091\u4e2a\u4eba\u6bcf\u5929\u751f\u4ea76\u4ef6\uff0c\u5176\u4f59\u6bcf\u4eba\u6bcf\u5929\u751f\u4ea711\u4ef6\uff1b\u4e59\u8f66\u95f4\u67091\u4eba\u6bcf\u5929\u751f\u4ea77\u4ef6\uff0c\u5176\u4f59\u6bcf\u4eba\u6bcf\u5929\u751f\u4ea710\u4ef6\uff0e\u5df2\u77e5\u4e24\u8f66\u95f4\u6bcf\u5929\u751f\u4ea7\u96f6\u4ef6\u7684\u603b\u6570\u76f8\u7b49\uff0c\u4e14\u6bcf\u4e2a\u8f66\u95f4\u6bcf\u5929\u751f\u4ea7\u96f6\u4ef6\u603b\u6570\u4e0d\u5c11\u4e8e100\u4ef6\u4e5f\u4e0d\u8d85\u8fc7200\u4ef6\uff0c\u5219\u7532\u8f66\u95f4\u6709\u591a\u5c11\u4eba\uff0c\u4e59\u8f66\u95f4\u6709\u591a\u5c11\u4eba\uff1f
\u8bbe\u7532\u8f66\u95f4\u4eba\u6570\u4e3ax
\u90a3\u4e48\u7532\u8f66\u95f4\u6bcf\u5929\u751f\u4ea7\u7684\u96f6\u4ef6\uff1a6+11(x-1)=11x-5
\u4e59\u8f66\u95f4\u7684\u4eba\u6570\uff1a(11x-5-7)/10+1=1.1x-0.2
100\u226411x-5\u2264200
95/11\u2264x\u2264195/11
x\u4e3a\u6574\u6570
9\u2264x\u226417
1.1x-0.2\u4e3a\u6574\u6570\uff0c
\u2234x=12 \u671b\u91c7\u7eb3\u8c22\u8c22\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01\uff01
OK\uff1f1.2x+9y=81
3x+y=34
2.9x+4y=35
8x+3y=30
3.7x+2y=52
7x+4y=62
4.4x+6y=54
9x+2y=87
5.2x+y=7
2x+5y=19
6.x+2y=21
3x+5y=56
7.5x+7y=52
5x+2y=22
8.5x+5y=65
7x+7y=203
9.8x+4y=56
x+4y=21
10.5x+7y=41
5x+8y=44
11.7x+5y=54
3x+4y=38
12.x+8y=15
4x+y=29
13.3x+6y=24
9x+5y=46
14.9x+2y=62
4x+3y=36
15.9x+4y=46
7x+4y=42
16.9x+7y=135
4x+y=41
17.3x+8y=51
x+6y=27
18.9x+3y=99
4x+7y=95
19.9x+2y=38
3x+6y=18
20.5x+5y=45
7x+9y=69
21.8x+2y=28
7x+8y=62
22.x+6y=14
3x+3y=27
23.7x+4y=67
2x+8y=26
24.5x+4y=52
7x+6y=74
25.7x+y=9
4x+6y=16
26.6x+6y=48
6x+3y=42
27.8x+2y=16
7x+y=11
28.4x+9y=77
8x+6y=94
29.6x+8y=68
7x+6y=66
30.2x+2y=22
7x+2y=47
1) 66x+17y=3967
25x+y=1200
\u7b54\u6848\uff1ax=48 y=47
(2) 18x+23y=2303
74x-y=1998
\u7b54\u6848\uff1ax=27 y=79
(3) 44x+90y=7796
44x+y=3476
\u7b54\u6848\uff1ax=79 y=48
(4) 76x-66y=4082
30x-y=2940
\u7b54\u6848\uff1ax=98 y=51
(5) 67x+54y=8546
71x-y=5680
\u7b54\u6848\uff1ax=80 y=59
(6) 42x-95y=-1410
21x-y=1575
\u7b54\u6848\uff1ax=75 y=48
(7) 47x-40y=853
34x-y=2006
\u7b54\u6848\uff1ax=59 y=48
(8) 19x-32y=-1786
75x+y=4950
\u7b54\u6848\uff1ax=66 y=95
(9) 97x+24y=7202
58x-y=2900
\u7b54\u6848\uff1ax=50 y=98
(10) 42x+85y=6362
63x-y=1638
\u7b54\u6848\uff1ax=26 y=62
(11) 85x-92y=-2518
27x-y=486
\u7b54\u6848\uff1ax=18 y=44
(12) 79x+40y=2419
56x-y=1176
\u7b54\u6848\uff1ax=21 y=19
(13) 80x-87y=2156
22x-y=880
\u7b54\u6848\uff1ax=40 y=12
(14) 32x+62y=5134
57x+y=2850
\u7b54\u6848\uff1ax=50 y=57
(15) 83x-49y=82
59x+y=2183
\u7b54\u6848\uff1ax=37 y=61
(16) 91x+70y=5845
95x-y=4275
\u7b54\u6848\uff1ax=45 y=25
(17) 29x+44y=5281
88x-y=3608
\u7b54\u6848\uff1ax=41 y=93
(18) 25x-95y=-4355
40x-y=2000
\u7b54\u6848\uff1ax=50 y=59
(19) 54x+68y=3284
78x+y=1404
\u7b54\u6848\uff1ax=18 y=34
(20) 70x+13y=3520
52x+y=2132
\u7b54\u6848\uff1ax=41 y=50
(21) 48x-54y=-3186
24x+y=1080
\u7b54\u6848\uff1ax=45 y=99
(22) 36x+77y=7619
47x-y=799
\u7b54\u6848\uff1ax=17 y=91
(23) 13x-42y=-2717
31x-y=1333
\u7b54\u6848\uff1ax=43 y=78
(24) 28x+28y=3332
52x-y=4628
\u7b54\u6848\uff1ax=89 y=30
(25) 62x-98y=-2564
46x-y=2024
\u7b54\u6848\uff1ax=44 y=54
(26) 79x-76y=-4388
26x-y=832
\u7b54\u6848\uff1ax=32 y=91
(27) 63x-40y=-821
42x-y=546
\u7b54\u6848\uff1ax=13 y=41
(28) 69x-96y=-1209
42x+y=3822
\u7b54\u6848\uff1ax=91 y=78
(29) 85x+67y=7338
11x+y=308
\u7b54\u6848\uff1ax=28 y=74
(30) 78x+74y=12928
14x+y=1218
\u7b54\u6848\uff1ax=87 y=83
(31) 39x+42y=5331
59x-y=5841
\u7b54\u6848\uff1ax=99 y=35
(32) 29x+18y=1916
58x+y=2320
\u7b54\u6848\uff1ax=40 y=42
(33) 40x+31y=6043
45x-y=3555
\u7b54\u6848\uff1ax=79 y=93
(34) 47x+50y=8598
45x+y=3780
\u7b54\u6848\uff1ax=84 y=93
(35) 45x-30y=-1455
29x-y=725
\u7b54\u6848\uff1ax=25 y=86
(36) 11x-43y=-1361
47x+y=799
\u7b54\u6848\uff1ax=17 y=36
(37) 33x+59y=3254
94x+y=1034
\u7b54\u6848\uff1ax=11 y=49
(38) 89x-74y=-2735
68x+y=1020
\u7b54\u6848\uff1ax=15 y=55
(39) 94x+71y=7517
78x+y=3822
\u7b54\u6848\uff1ax=49 y=41
(40) 28x-62y=-4934
46x+y=552
\u7b54\u6848\uff1ax=12 y=85
(41) 75x+43y=8472
17x-y=1394
\u7b54\u6848\uff1ax=82 y=54
(42) 41x-38y=-1180
29x+y=1450
\u7b54\u6848\uff1ax=50 y=85
(43) 22x-59y=824
63x+y=4725
\u7b54\u6848\uff1ax=75 y=14
(44) 95x-56y=-401
90x+y=1530
\u7b54\u6848\uff1ax=17 y=36
(45) 93x-52y=-852
29x+y=464
\u7b54\u6848\uff1ax=16 y=45
(46) 93x+12y=8823
54x+y=4914
\u7b54\u6848\uff1ax=91 y=30
(47) 21x-63y=84
20x+y=1880
\u7b54\u6848\uff1ax=94 y=30
(48) 48x+93y=9756
38x-y=950
\u7b54\u6848\uff1ax=25 y=92
(49) 99x-67y=4011
75x-y=5475
\u7b54\u6848\uff1ax=73 y=48
(50) 83x+64y=9291
90x-y=3690
\u7b54\u6848\uff1ax=41 y=92
(51) 17x+62y=3216
75x-y=7350
\u7b54\u6848\uff1ax=98 y=25
(52) 77x+67y=2739
14x-y=364
\u7b54\u6848\uff1ax=26 y=11
(53) 20x-68y=-4596
14x-y=924
\u7b54\u6848\uff1ax=66 y=87
(54) 23x+87y=4110
83x-y=5727
\u7b54\u6848\uff1ax=69 y=29
(55) 22x-38y=804
86x+y=6708
\u7b54\u6848\uff1ax=78 y=24
(56) 20x-45y=-3520
56x+y=728
\u7b54\u6848\uff1ax=13 y=84
(57) 46x+37y=7085
61x-y=4636
\u7b54\u6848\uff1ax=76 y=97
(58) 17x+61y=4088
71x+y=5609
\u7b54\u6848\uff1ax=79 y=45
(59) 51x-61y=-1907
89x-y=2314
\u7b54\u6848\uff1ax=26 y=53
(60) 69x-98y=-2404
21x+y=1386
\u7b54\u6848\uff1ax=66 y=71
(61) 15x-41y=754
74x-y=6956
\u7b54\u6848\uff1ax=94 y=16
(62) 78x-55y=656
89x+y=5518
\u7b54\u6848\uff1ax=62 y=76
(63) 29x+21y=1633
31x-y=713
\u7b54\u6848\uff1ax=23 y=46
(64) 58x-28y=2724
35x+y=3080
\u7b54\u6848\uff1ax=88 y=85
(65) 28x-63y=-2254
88x-y=2024
\u7b54\u6848\uff1ax=23 y=46
(66) 43x+50y=7064
85x+y=8330
\u7b54\u6848\uff1ax=98 y=57
(67) 58x-77y=1170
38x-y=2280
\u7b54\u6848\uff1ax=60 y=30
(68) 92x+83y=11586
43x+y=3010
\u7b54\u6848\uff1ax=70 y=62
(69) 99x+82y=6055
52x-y=1716
\u7b54\u6848\uff1ax=33 y=34
(70) 15x+26y=1729
94x+y=8554
\u7b54\u6848\uff1ax=91 y=14
(71) 64x+32y=3552
56x-y=2296
\u7b54\u6848\uff1ax=41 y=29
(72) 94x+66y=10524
84x-y=7812
\u7b54\u6848\uff1ax=93 y=27
(73) 65x-79y=-5815
89x+y=2314
\u7b54\u6848\uff1ax=26 y=95
(74) 96x+54y=6216
63x-y=1953
\u7b54\u6848\uff1ax=31 y=60
(75) 60x-44y=-352
33x-y=1452
\u7b54\u6848\uff1ax=44 y=68
(76) 79x-45y=510
14x-y=840
\u7b54\u6848\uff1ax=60 y=94
(77) 29x-35y=-218
59x-y=4897
\u7b54\u6848\uff1ax=83 y=75
(78) 33x-24y=1905
30x+y=2670
\u7b54\u6848\uff1ax=89 y=43
(79) 61x+94y=11800
93x+y=5952
\u7b54\u6848\uff1ax=64 y=84
(80) 61x+90y=5001
48x+y=2448
\u7b54\u6848\uff1ax=51 y=21
(81) 93x-19y=2
86x-y=1548
\u7b54\u6848\uff1ax=18 y=88
(82) 19x-96y=-5910
30x-y=2340
\u7b54\u6848\uff1ax=78 y=77
(83) 80x+74y=8088
96x-y=8640
\u7b54\u6848\uff1ax=90 y=12
(84) 53x-94y=1946
45x+y=2610
\u7b54\u6848\uff1ax=58 y=12
(85) 93x+12y=9117
28x-y=2492
\u7b54\u6848\uff1ax=89 y=70
(86) 66x-71y=-1673
99x-y=7821
\u7b54\u6848\uff1ax=79 y=97
(87) 43x-52y=-1742
76x+y=1976
\u7b54\u6848\uff1ax=26 y=55
(88) 70x+35y=8295
40x+y=2920
\u7b54\u6848\uff1ax=73 y=91
(89) 43x+82y=4757
11x+y=231
\u7b54\u6848\uff1ax=21 y=47
(90) 12x-19y=236
95x-y=7885
\u7b54\u6848\uff1ax=83 y=40
(91) 51x+99y=8031
71x-y=2911
\u7b54\u6848\uff1ax=41 y=60
(92) 37x+74y=4403
69x-y=6003
\u7b54\u6848\uff1ax=87 y=16
(93) 46x+34y=4820
71x-y=5183
\u7b54\u6848\uff1ax=73 y=43
(94) 47x+98y=5861
55x-y=4565
\u7b54\u6848\uff1ax=83 y=20
(95) 30x-17y=239
28x+y=1064
\u7b54\u6848\uff1ax=38 y=53
(96) 55x-12y=4112
79x-y=7268
\u7b54\u6848\uff1ax=92 y=79
(97) 27x-24y=-450
67x-y=3886
\u7b54\u6848\uff1ax=58 y=84
(98) 97x+23y=8119
14x+y=966
\u7b54\u6848\uff1ax=69 y=62
(99) 84x+53y=11275
70x+y=6790
\u7b54\u6848\uff1ax=97 y=59
(100) 51x-97y=297
19x-y=1520
\u7b54\u6848\uff1ax=80 y=39
25x+y=1200
答案：x=48 y=47
(2) 18x+23y=2303
74x-y=1998
答案：x=27 y=79
(3) 44x+90y=7796
44x+y=3476
答案：x=79 y=48
(4) 76x-66y=4082
30x-y=2940
答案：x=98 y=51
(5) 67x+54y=8546
71x-y=5680
答案：x=80 y=59
(6) 42x-95y=-1410
21x-y=1575
答案：x=75 y=48
(7) 47x-40y=853
34x-y=2006
答案：x=59 y=48
(8) 19x-32y=-1786
75x+y=4950
答案：x=66 y=95
(9) 97x+24y=7202
58x-y=2900
答案：x=50 y=98
(10) 42x+85y=6362
63x-y=1638
答案：x=26 y=62
(11) 85x-92y=-2518
27x-y=486
答案：x=18 y=44
(12) 79x+40y=2419
56x-y=1176
答案：x=21 y=19
(13) 80x-87y=2156
22x-y=880
答案：x=40 y=12
(14) 32x+62y=5134
57x+y=2850
答案：x=50 y=57
(15) 83x-49y=82
59x+y=2183
答案：x=37 y=61
(16) 91x+70y=5845
95x-y=4275
答案：x=45 y=25
(17) 29x+44y=5281
88x-y=3608
答案：x=41 y=93
(18) 25x-95y=-4355
40x-y=2000
答案：x=50 y=59
(19) 54x+68y=3284
78x+y=1404
答案：x=18 y=34
(20) 70x+13y=3520
52x+y=2132
答案：x=41 y=50
(21) 48x-54y=-3186
24x+y=1080
答案：x=45 y=99
(22) 36x+77y=7619
47x-y=799
答案：x=17 y=91
(23) 13x-42y=-2717
31x-y=1333
答案：x=43 y=78
(24) 28x+28y=3332
52x-y=4628
答案：x=89 y=30
(25) 62x-98y=-2564
46x-y=2024
答案：x=44 y=54
(26) 79x-76y=-4388
26x-y=832
答案：x=32 y=91
(27) 63x-40y=-821
42x-y=546
答案：x=13 y=41
(28) 69x-96y=-1209
42x+y=3822
答案：x=91 y=78
(29) 85x+67y=7338
11x+y=308
答案：x=28 y=74
(30) 78x+74y=12928
14x+y=1218
答案：x=87 y=83
(31) 39x+42y=5331
59x-y=5841
答案：x=99 y=35
(32) 29x+18y=1916
58x+y=2320
答案：x=40 y=42
(33) 40x+31y=6043
45x-y=3555
答案：x=79 y=93
(34) 47x+50y=8598
45x+y=3780
答案：x=84 y=93
(35) 45x-30y=-1455
29x-y=725
答案：x=25 y=86
(36) 11x-43y=-1361
47x+y=799
答案：x=17 y=36
(37) 33x+59y=3254
94x+y=1034
答案：x=11 y=49
(38) 89x-74y=-2735
68x+y=1020
答案：x=15 y=55
(39) 94x+71y=7517
78x+y=3822
答案：x=49 y=41
(40) 28x-62y=-4934
46x+y=552
答案：x=12 y=85
(41) 75x+43y=8472
17x-y=1394
答案：x=82 y=54
(42) 41x-38y=-1180
29x+y=1450
答案：x=50 y=85
(43) 22x-59y=824
63x+y=4725
答案：x=75 y=14
(44) 95x-56y=-401
90x+y=1530
答案：x=17 y=36
(45) 93x-52y=-852
29x+y=464
答案：x=16 y=45
(46) 93x+12y=8823
54x+y=4914
答案：x=91 y=30
(47) 21x-63y=84
20x+y=1880
答案：x=94 y=30
(48) 48x+93y=9756
38x-y=950
答案：x=25 y=92
(49) 99x-67y=4011
75x-y=5475
答案：x=73 y=48
(50) 83x+64y=9291
90x-y=3690
答案：x=41 y=92
(51) 17x+62y=3216
75x-y=7350
答案：x=98 y=25
(52) 77x+67y=2739
14x-y=364
答案：x=26 y=11
(53) 20x-68y=-4596
14x-y=924
答案：x=66 y=87
(54) 23x+87y=4110
83x-y=5727
答案：x=69 y=29
(55) 22x-38y=804
86x+y=6708
答案：x=78 y=24
(56) 20x-45y=-3520
56x+y=728
答案：x=13 y=84
(57) 46x+37y=7085
61x-y=4636
答案：x=76 y=97
(58) 17x+61y=4088
71x+y=5609
答案：x=79 y=45
(59) 51x-61y=-1907
89x-y=2314
答案：x=26 y=53
(60) 69x-98y=-2404
21x+y=1386
答案：x=66 y=71
(61) 15x-41y=754
74x-y=6956
答案：x=94 y=16
(62) 78x-55y=656
89x+y=5518
答案：x=62 y=76
(63) 29x+21y=1633
31x-y=713
答案：x=23 y=46
(64) 58x-28y=2724
35x+y=3080
答案：x=88 y=85
(65) 28x-63y=-2254
88x-y=2024
答案：x=23 y=46
(66) 43x+50y=7064
85x+y=8330
答案：x=98 y=57
(67) 58x-77y=1170
38x-y=2280
答案：x=60 y=30
(68) 92x+83y=11586
43x+y=3010
答案：x=70 y=62
(69) 99x+82y=6055
52x-y=1716
答案：x=33 y=34
(70) 15x+26y=1729
94x+y=8554
答案：x=91 y=14
(71) 64x+32y=3552
56x-y=2296
答案：x=41 y=29
(72) 94x+66y=10524
84x-y=7812
答案：x=93 y=27
(73) 65x-79y=-5815
89x+y=2314
答案：x=26 y=95
(74) 96x+54y=6216
63x-y=1953
答案：x=31 y=60
(75) 60x-44y=-352
33x-y=1452
答案：x=44 y=68
(76) 79x-45y=510
14x-y=840
答案：x=60 y=94
(77) 29x-35y=-218
59x-y=4897
答案：x=83 y=75
(78) 33x-24y=1905
30x+y=2670
答案：x=89 y=43
(79) 61x+94y=11800
93x+y=5952
答案：x=64 y=84
(80) 61x+90y=5001
48x+y=2448
答案：x=51 y=21
(81) 93x-19y=2
86x-y=1548
答案：x=18 y=88
(82) 19x-96y=-5910
30x-y=2340
答案：x=78 y=77
(83) 80x+74y=8088
96x-y=8640
答案：x=90 y=12
(84) 53x-94y=1946
45x+y=2610
答案：x=58 y=12
(85) 93x+12y=9117
28x-y=2492
答案：x=89 y=70
(86) 66x-71y=-1673
99x-y=7821
答案：x=79 y=97
(87) 43x-52y=-1742
76x+y=1976
答案：x=26 y=55
(88) 70x+35y=8295
40x+y=2920
答案：x=73 y=91
(89) 43x+82y=4757
11x+y=231
答案：x=21 y=47
(90) 12x-19y=236
95x-y=7885
答案：x=83 y=40
(91) 51x+99y=8031
71x-y=2911
答案：x=41 y=60
(92) 37x+74y=4403
69x-y=6003
答案：x=87 y=16
(93) 46x+34y=4820
71x-y=5183
答案：x=73 y=43
(94) 47x+98y=5861
55x-y=4565
答案：x=83 y=20
(95) 30x-17y=239
28x+y=1064
答案：x=38 y=53
(96) 55x-12y=4112
79x-y=7268
答案：x=92 y=79
(97) 27x-24y=-450
67x-y=3886
答案：x=58 y=84
(98) 97x+23y=8119
14x+y=966
答案：x=69 y=62
(99) 84x+53y=11275
70x+y=6790
答案：x=97 y=59
(100) 51x-97y=297
19x-y=1520
答案：x=80 y=39
1.2x+y=3
4x-3y=5
2.x+y=2
2x+3y=5
3.5x+45-y=1
x-y=-45
4.y+x+1=32
x-y=10
5.4(2x-y)=5
4x-y=3
6.0.5x+0.5y=1
1.5x-y=1
7.56x+23y=64
14x-21y=10
8.5x+5y=10
x-y=0
9.32.1x-7y=8
71.3y-65x=90
10.x+y-45=91
5x-3y=23
恩 好的
两个数相加等于100，相减等于20 ，求这两个数各为多少？
解：设一个数为X，另一个数为Y，则
X+Y=100
X-Y=20
解方程组，得X=60
Y=40
h495812d
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