初一上册500道数学计算题【带答案】 初一上册数学100道计算题(带答案）
\u521d\u4e00\u4e0a\u518c100\u9053\u6570\u5b66\u8ba1\u7b97\u9898\u53ca\u7b54\u6848\u30022x+17=35
3x-67=11
12+8x=52
0.8x-4.2=2.2
2x+5=10
3x-15=75
4x+40=320
3x+77=122
5x-1.6=0.6
6x-4=20
10x-0.6=2.4
500-12x=140
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
\uff08\u521d\u4e00\u4e0a\u518c\uff09
\u4e00\u3001\u521d\u4e00\u8d28\u91cf\u76d1\u6d4b\uff1a
1\u3001\u52c7\u58eb\u6392\u7403\u961f\u56db\u573a\u6bd4\u8d5b\u7684\u6210\u7ee9\uff08\u4e94\u5c40\u4e09\u80dc\u5236\uff09\u662f1:3\uff0c3:2, 0:3, 3:1\uff0c\u603b\u7684\u51c0\u80dc\u5c40\u6570\u662f\u591a\u5c11\uff1fP6\u9875
\u89e3\uff1a1+3+3-\uff083+2+3+1\uff09
=7-9
=-2
\u7b54\uff1a\u603b\u7684\u51c0\u80dc\u5c40\u6570\u662f-2
2\u3001\u4e0b\u5217\u5404\u6570\u662f10\u540d\u5b66\u751f\u7684\u6570\u5b66\u8003\u8bd5\u6210\u7ee9\uff0c\u5148\u4f30\u7b97\u4ed6\u4eec\u7684\u5e73\u5747\u6210\u7ee9\uff0c\u7136\u540e\u5728\u6b64\u57fa\u7840\u4e0a\u8ba1\u7b97\u5e73\u5747\u6210\u7ee9\uff0c\u7531\u6b64\u68c0\u9a8c\u4f60\u7684\u4f30\u503c\u80fd\u529b\u3002P6\u9875
82, 83, 78, 66, 95, 75, 56, 93, 82, 81
\u6211\u4f30\u7b97\u4ed6\u4eec\u7684\u5e73\u5747\u6210\u7ee9\u4e3a80\u5206\u3002
\u89e3\uff1a\uff0882+83+78+66+95+75+56+93+82+81\uff09\u00f710
=791\u00f710
=79.1\uff08\u5206\uff09
\u7b54\uff1a\u4ed6\u4eec\u7684\u5e73\u5747\u6210\u7ee9\u4e3a79.1\u5206\u3002
3\u3001\u5f53\u6e29\u5ea6\u6bcf\u4e0a\u53471\u00b0C\u65f6\uff0c\u67d0\u79cd\u91d1\u5c5e\u4e1d\u4f38\u957f0.002mm\u3002\u53cd\u4e4b\uff0c\u5f53\u6e29\u5ea6\u6bcf\u4e0b\u964d 1\u00b0C\u65f6\uff0c\u91d1\u5c5e\u4e1d\u7f29\u77ed0.002mm\u3002\u628a15\u00b0C\u7684\u91d1\u5c5e\u4e1d\u52a0\u70ed\u523060\u00b0C\uff0c\u518d\u4f7f\u5b83\u51b7\u5374\u964d\u6e29\u52305\u00b0C\uff0c\u91d1\u5c5e\u4e1d\u7684\u957f\u5ea6\u7ecf\u5386\u4e86\u600e\u6837\u7684\u53d8\u5316\uff1f\u6700\u540e\u7684\u957f\u5ea6\u6bd4\u539f\u957f\u5ea6\u4f38\u957f\u591a\u5c11\uff1fP7\u9875
\u89e3\uff1a\u2474\u3001\uff0860-15\uff09\u00d70.002=0.09(mm)
\u2475\u30010.09-(60-5) \u00d70.002
=0.09-0. 11
=-0.02(mm)
\u7b54\uff1a\u6700\u540e\u7684\u957f\u5ea6\u6bd4\u539f\u957f\u5ea6\u4f38\u957f-0.02mm\u3002
4\u3001\u4e00\u5e74\u4e4b\u4e2d\u5730\u7403\u4e0e\u592a\u9633\u4e4b\u95f4\u7684\u8ddd\u79bb\u968f\u65f6\u95f4\u800c\u53d8\u5316\uff0c1\u4e2a\u5929\u6587\u5355\u4f4d\u662f\u5730\u7403\u4e0e\u592a\u9633\u4e4b\u95f4\u7684\u5e73\u5747\u8ddd\u79bb\uff0c\u53731.4960\u4ebf\u5343\u7c73\u3002\u8bd5\u7528\u79d1\u5b66\u8ba1\u6570\u6cd5\u8868\u793a1\u4e2a\u5929\u6587\u5355\u4f4d\u662f\u591a\u5c11\u5343\u7c73\uff08\u4fdd\u75594\u4e2a\u6709\u6548\u6570\u5b57\uff09\u3002P7\u9875
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\u22481.496\u00d7108\uff08\u5343\u7c73\uff09
\u2234\u4e00\u4e2a\u5929\u6587\u5355\u4f4d\u7ea6\u662f1.496\u00d7108\u5343\u7c73\u3002
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5\u3001\u67d0\u5546\u5e97\u4ee5\u6bcf\u8f86250\u5143\u7684\u8fdb\u4ef7\u8d2d\u5165200\u8f86\u81ea\u884c\u8f66\uff0c\u5e76\u4ee5\u6bcf\u8f86275\u5143\u7684\u4ef7\u683c\u9500\u552e\u3002\u4e24\u4e2a\u6708\u540e\u81ea\u884c\u8f66\u7684\u9500\u552e\u6b3e\u5df2\u8d85\u8fc7\u8fd9\u6279\u81ea\u884c\u8f66\u7684\u8fdb\u8d27\u6b3e\uff0c\u8fd9\u65f6\u81f3\u5c11\u5df2\u552e\u51fa\u591a\u5c11\u8f86\u81ea\u884c\u8f66\uff1fP54\u9875
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275X\ufe65250\u00d7200
275X\ufe6550000
X\ufe65181.11......
\u2235 X\u4e3a\u6574\u6570
\u2234 X=182
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6\u3001\u91c7\u77f3\u573a\u7206\u7834\u65f6\uff0c\u70b9\u71c3\u5bfc\u706b\u7ebf\u540e\u5de5\u4eba\u8981\u5728\u7206\u7834\u524d\u8f6c\u79fb\u5230400\u7c73\u5916\u7684\u5b89\u5168\u533a\u57df\u3002\u5bfc\u706b\u7ebf\u71c3\u70e7\u901f\u5ea6\u662f1\u5398\u7c73/\u79d2\uff0c\u5de5\u4eba\u8f6c\u79fb\u7684\u901f\u5ea6\u662f5\u7c73/\u79d2\uff0c\u5bfc\u706b\u7ebf\u81f3\u5c11\u9700\u8981\u591a\u957f\uff1f
\u89e3\uff1a\u8bbe\u5bfc\u706b\u7ebf\u81f3\u5c11\u9700\u8981X\u7c73\uff0c\u5f97
400\u00f75\u2264X/0.01
80\u2264X/0.01
X\u22650.8
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7\u3001\u4e00\u8258\u8f6e\u8239\u4ece\u67d0\u6c5f\u4e0a\u6e38\u7684A\u5730\u5300\u901f\u9a76\u5230\u4e0b\u6e38\u7684B\u5730\u7528\u4e8610\u5c0f\u65f6\uff0c\u4eceB\u5730\u5300\u901f\u8fd4\u56deA\u5730\u7528\u4e86\u4e0d\u523012\u5c0f\u65f6\uff0c\u8fd9\u6bb5\u6c5f\u6c34\u6d41\u901f\u4e3a3\u5343\u7c73/\u65f6\uff0c\u8f6e\u8239\u5f80\u8fd4\u7684\u9759\u6c34\u901f\u5ea6V
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\u89e3\uff1aV\ufe6533
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1.5\u2264\uff08100%-5%\uff09X
1.5\u22640.95X
X\u22651.5789
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\u89e3\uff1a\u8bbe\u524d\u5e74\u5168\u5382\u5229\u6da6\u4e3aX\u4e07\u5143\u3002P55\u9875
X\u00f7280+0.6\ufe64\uff08X+100\uff09\u00f7\uff08280-40\uff09
6X+1008\ufe647(X+100\uff09
-X\ufe64-1008+100
-X\ufe64-308
X\ufe65308
\u7b54\uff1a\u524d\u5e74\u5168\u5382\u5229\u6da6\u662f308\u4e07\u5143\u3002
\u25c610\u30012002\u5e74\u5317\u4eac\u7a7a\u6c14\u8d28\u91cf\u826f\u597d\uff08\u4e8c\u7ea7\u4ee5\u4e0a\uff09\u7684\u5929\u6570\u4e0e\u5168\u5e74\u5929\u6570\u4e4b\u6bd4\u8fbe\u523055%\uff0c\u5982\u679c\u52302008\u5e74\u8fd9\u6837\u7684\u6bd4\u503c\u8981\u8d85\u8fc770%\uff0c\u90a3\u4e482008\u5e74\u7a7a\u6c14\u8d28\u91cf\u826f\u597d\u7684\u5929\u6570\u8981\u6bd42002\u5e74\u81f3\u5c11\u589e\u52a0\u591a\u5c11\uff1f\uff08\u6bcf\u5e74\u5747\u6309365\u5929\u8ba1\u7b97\uff09P55\u9875
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X\u2265365\u00d7\uff0870%-55%\uff09
X\u2265365\u00d715%
X\u226554.75
\u7b54\uff1a2008\u5e74\u7a7a\u6c14\u8d28\u91cf\u826f\u597d\u7684\u5929\u6570\u8981\u6bd42002\u5e74\u81f3\u5c11\u589e\u52a055\u5929\u3002
11\u3001\u6709\u4e00\u4e2a\u4e24\u4f4d\u6570\uff0c\u5982\u679c\u628a\u5b83\u7684\u4e2a\u4f4d\u6570\u5b57a\u548c\u5341\u4f4d\u6570\u5b57b\u5bf9\u8c03\uff0c\u90a3\u4e48\u4ec0\u4e48\u60c5\u51b5\u4e0b\u5f97\u5230\u7684\u4e24\u4f4d\u6570\u6bd4\u539f\u6765\u7684\u4e24\u4f4d\u6570\u5927\uff1f\u4ec0\u4e48\u60c5\u51b5\u4e0b\u5f97\u5230\u7684\u4e24\u4f4d\u6570\u6bd4\u539f\u6765\u7684\u4e24\u4f4d\u6570\u5c0f\uff1f\u4ec0\u4e48\u60c5\u51b5\u4e0b\u5f97\u5230\u7684\u4e24\u4f4d\u6570\u7b49\u4e8e\u539f\u6765\u7684\u4e24\u4f4d\u6570\uff1fP55\u9875
\u89e3\uff1a 10a+b\ufe6510b+a (1)
10b+a\ufe6510a+b (2)
10a+b=10b+a (3)
a\ufe65b (1)
b\ufe65a (2)
a =b (3)
\u2234 (1)\u3001\u5f53a\ufe65b\u65f6\uff0c\u5f97\u5230\u7684\u4e24\u4f4d\u6570\u6bd4\u539f\u6765\u7684\u4e24\u4f4d\u6570\u5927
(2)\u3001\u5f53 b\ufe65a\u65f6\uff0c\u5f97\u5230\u7684\u4e24\u4f4d\u6570\u6bd4\u539f\u6765\u7684\u4e24\u4f4d\u6570\u5c0f
(3)\u3001\u5f53 b=a\u65f6\uff0c\u5f97\u5230\u7684\u4e24\u4f4d\u6570\u7b49\u4e8e\u539f\u6765\u7684\u4e24\u4f4d\u6570
12\u3001\u67d0\u6b21\u77e5\u8bc6\u7ade\u8d5b\u670920\u9053\u9898\uff0c\u6bcf\u4e00\u9898\u7b54\u5bf9\u5f9710\u5206\uff0c\u7b54\u9519\u6216\u4e0d\u7b54\u90fd\u62635\u5206\u3002\u5c0f\u660e\u5f97\u5206\u8981\u8d85\u8fc790\u5206\uff0c\u4ed6\u81f3\u5c11\u8981\u7b54\u5bf9\u591a\u5c11\u9053\u9898\uff1fP55\u9875
\u89e3\uff1a\u8bbe\u4ed6\u81f3\u5c11\u8981\u7b54\u5bf9X\u9053\u9898\u3002
10X-(20-X) \u00d75\ufe6590
10X-100+5X\ufe6590
15X\ufe65190
X\ufe6512.66\u2026\u2026
\u2235X\u4e3a\u6574\u6570
\u2234X=13
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13\u3001\u4e00\u4ef6\u7531\u9ec4\u91d1\u4e0e\u767d\u94f6\u5236\u6210\u7684\u9996\u9970\u91cda\u514b\uff0c\u5546\u5bb6\u79f0\u5176\u4e2d\u9ec4\u91d1\u542b\u91cf\u4e0d\u4f4e\u4e8e90%\uff0c\u9ec4\u91d1\u4e0e\u767d\u94f6\u7684\u5bc6\u5ea6\u5206\u522b\u662f19.3g/cm3\u4e0e10.5g/cm3\uff0c\u5217\u51fa\u4e0d\u7b49\u5f0f\u8868\u793a\u8fd9\u4ef6\u9996\u9970\u7684\u4f53\u79ef\u5e94\u6ee1\u8db3\u4ec0\u4e48\u6761\u4ef6\u3002P56\u9875
\uff08\u63d0\u793a\uff1a\u8d28\u91cf=\u5bc6\u5ea6\u00d7\u4f53\u79ef\uff09
\u89e3\uff1aV\ufe640.9a\u00f719.3+0.1a\u00f710.5
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\u89e3\uff1a\u8bbe\u987e\u5ba2\u7684\u6d88\u8d39\u91d1\u989d\u4e3aX\u5143
\u7532 100+\uff08X-100\uff09\u00d70.9
\u4e59 50+\uff08X-50\uff09\u00d70.95
\u2235 \u7532 \ufe65 \u4e59
\u2234 100+\uff08X-100\uff09\u00d70.9\ufe6550+\uff08X-50\uff09\u00d70.95
X\ufe64150
\u5982\uff1aX\ufe6450\u65f6\uff0c\u5728\u7532\u3001\u4e59\u5e97\u4e70\u90fd\u4e0d\u4f18\u60e0
\u5f5350\ufe64X\ufe64100\u65f6\uff0c\u5728\u4e59\u5e97\u4e70\u4f18\u60e0
\u5f53100\ufe64X\ufe64150\u65f6\uff0c\u5728\u4e59\u5e97\u4e70\u4f18\u60e0
\u5f53X\ufe65150\u65f6\uff0c\u5728\u7532\u5e97\u4e70\u4f18\u60e0
15\u3001\u4e00\u672c\u82f1\u8bed\u4e66\u517198\u9875\uff0c\u5f20\u529b\u8bfb\u4e86\u4e00\u5468\uff087\u5929\uff09\u8fd8\u6ca1\u8bfb\u5b8c\uff0c\u800c\u674e\u6c38\u4e0d\u5230\u4e00\u5468\u5c31\u5df2\u8bfb\u5b8c\u3002\u674e\u6c38\u5e73\u5747\u6bcf\u5929\u6bd4\u5f20\u529b\u591a\u8bfb3\u9875\uff0c\u5f20\u529b\u5e73\u5747\u6bcf\u5929\u8bfb\u591a\u5c11\u9875\uff08\u7b54\u6848\u53d6\u6574\u6570\uff09\uff1fP60\u9875
\u89e3\uff1a\u8bbe\u674e\u6c38\u6bcf\u5929\u8bfb\uff08X+3\uff09\u9875\uff0c\u5f20\u529b\u6bcf\u5929\u8bfbX\u9875
7X\ufe6498 \uff081\uff09
7\uff08X+3\uff09\ufe6598 \uff082\uff09
X\ufe6414 \uff081\uff09
X\ufe6511 \uff082\uff09
\u2234 \u4e0d\u7b49\u5f0f\u89e3\u96c6\u4e3a11\ufe64X\ufe6414
\u2235 X\u4e3a\u6574\u6570
\u2234 X=12,13
\u7b54\uff1a\u5f20\u529b\u5e73\u5747\u6bcf\u5929\u8bfb12,13\u9875\u4e66\u3002
16\u30013\u4e2a\u5c0f\u7ec4\u8ba1\u5212\u572810\u5929\u5185\u751f\u4ea7500\u4ef6\u4ea7\u54c1\uff08\u6bcf\u5929\u751f\u4ea7\u91cf\u76f8\u540c\uff09\uff0c\u6309\u539f\u5148\u7684\u751f\u4ea7\u901f\u5ea6\uff0c\u4e0d\u80fd\u5b8c\u6210\u4efb\u52a1\uff1b\u5982\u679c\u6bcf\u4e2a\u5c0f\u7ec4\u6bcf\u5929\u6bd4\u539f\u5148\u591a\u751f\u4ea71\u4ef6\u4ea7\u54c1\uff0c\u5c31\u80fd\u63d0\u524d\u5b8c\u6210\u4efb\u52a1\u3002\u6bcf\u4e2a\u5c0f\u7ec4\u539f\u5148\u6bcf\u5929\u751f\u4ea7\u591a\u5c11\u4ef6\u4ea7\u54c1\uff1fP60\u9875
\u89e3\uff1a\u8bbe\u6bcf\u4e2a\u5c0f\u7ec4\u539f\u5148\u6bcf\u5929\u751f\u4ea7X\u4ef6\u4ea7\u54c1\u3002
3X\u00d710\ufe64500 \uff081\uff09
3\uff08X+1\uff09\u00d710\ufe65500 \uff082\uff09
X\ufe6450/3 \uff081\uff09
X\ufe6547/3 \uff082\uff09
\u2234 47/3 \ufe64X\ufe6450/3
\u2235 X\u4e3a\u6574\u6570
\u2234 X=16
\u7b54\uff1a\u6bcf\u4e2a\u5c0f\u7ec4\u539f\u5148\u6bcf\u5929\u751f\u4ea716\u4ef6\u4ea7\u54c1\u3002
17\u3001\u67d0\u5546\u54c1\u7684\u552e\u4ef7\u662f150\u5143\uff0c\u5546\u5bb6\u552e\u51fa\u4e00\u4ef6\u8fd9\u79cd\u5546\u54c1\u53ef\u83b7\u5229\u6da6\u662f\u8fdb\u4ef7\u768410%\uff5e20%\uff0c\u8fdb\u4ef7\u7684\u8303\u56f4\u662f\u4ec0\u4e48\uff08\u7cbe\u786e\u52301\u5143\uff09\uff1fP62\u9875
\u89e3\uff1a\u8bbe\u8fdb\u4ef7X\u5143\u3002
X+10%X=150 \uff081\uff09
X+20%X=150 \uff082\uff09
X\u2248136 (1)
X=125 (2)
\u2234 \u8fdb\u4ef7\u8303\u56f4\u662f125\u5143\uff5e136\u5143\u3002
\u25c618\u3001\u7528\u6bcf\u5206\u949f\u53ef\u62bd1.1\u5428\u6c34\u7684A\u578b\u62bd\u6c34\u673a\u6765\u62bd\u6c34\uff0c\u534a\u5c0f\u65f6\u53ef\u4ee5\u62bd\u5b8c\uff1b\u5982\u679c\u7528B\u578b\u62bd\u6c34\u673a\uff0c\u4f30\u8ba120\u5206\u523022\u5206\u53ef\u4ee5\u62bd\u5b8c\u3002B\u578b\u62bd\u6c34\u673a\u6bd4A\u578b\u62bd\u6c34\u673a\u6bcf\u5206\u949f\u591a\u62bd\u591a\u5c11\u5428\u6c34\uff1fP63\u9875
\u89e3\uff1a\u8bbeB\u578b\u62bd\u6c34\u673a\u6bcf\u5206\u949f\u53ef\u62bdX\u5428\u6c34\u3002
20\u22641.1\u00d730/X\u226422
20X\u22641.1\u00d730
22X\u22651.1\u00d730
20X\u226433
22X\u226533
X\u22641.65
X\u22651.5
\u2234 1.5\u2264X\u22641.65
1.5-1.1=0.4
1.65-1.1=0.55
\u2235\u8bbeB\u578b\u62bd\u6c34\u673a\u6bd4A\u578b\u62bd\u6c34\u673a\u6bcf\u5206\u949f\u591a\u62bdY\u5428\u6c34\u3002
\u22340.4\u2264Y\u22640.55
\u7b54\uff1aB\u578b\u62bd\u6c34\u673a\u6bd4A\u578b\u62bd\u6c34\u673a\u6bcf\u5206\u949f\u591a\u62bd\u591a\u5c110.4\uff5e0.55\u5428\u6c34\u3002
\u25c619\u3001\u628a\u4e00\u4e9b\u4e66\u5206\u7ed9\u51e0\u4e2a\u5b66\u751f\uff0c\u5982\u679c\u6bcf\u4eba\u52063\u672c\u4e66\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\u3002\u8fd9\u4e9b\u4e66\u6709\u591a\u5c11\u672c\uff1f\u5b66\u751f\u6709\u591a\u5c11\u4eba\uff1fP64\u9875
\u89e3\uff1a\u8bbe\u8fd9\u4e9b\u4e66\u6709X\u672c,\u5b66\u751f\u6709Y\u4eba\u3002
3Y+8=X (1)
5(Y-1)+3=X (2)
\u89e3\uff1a 3Y+8=X (1)
5Y-X =2 (2)
\uff082\uff09-\uff081\uff09\u5f972Y=10
Y=5
\u628aY=5\u4ee3\u5165\uff081\uff09\u5f97
15+8=X
X=23
\u2234 X=23
Y=5
\u7b54\uff1a\u8fd9\u4e9b\u4e66\u670923\u672c\uff1f\u5b66\u751f\u67095\u4eba\uff1f
\u5217\u65b9\u7a0b\u89e3\u5e94\u7528\u9898
1\u3001\u8fd0\u900129.5\u5428\u7164\uff0c\u5148\u7528\u4e00\u8f86\u8f7d\u91cd4\u5428\u6c7d\u8f66\u8fd03\u6b21\uff0c\u5269\u4e0b\u7684\u7528\u4e00\u8f86\u8f7d\u91cd\u4e3a2.5\u5428\u7684\u8d27\u8f66\u8fd0\u3002\u8fd8\u8981\u8fd0\u51e0\u6b21\u624d\u80fd\u5b8c\uff1f
\u89e3\uff1a\u8bbe\u8fd8\u8981\u8fd0x\u6b21\u624d\u80fd\u5b8c \u3002
29.5-3\u00d74=2.5x
17.5=2.5x
x=7
\u7b54\uff1a\u8fd8\u8981\u8fd07\u6b21\u624d\u80fd\u5b8c
2\u3001\u4e00\u5757\u68af\u5f62\u7530\u7684\u9762\u79ef\u662f90\u5e73\u65b9\u7c73\uff0c\u4e0a\u5e95\u662f7\u7c73\uff0c\u4e0b\u5e95\u662f11\u7c73\uff0c\u5b83\u7684\u9ad8\u662f\u51e0\u7c73\uff1f
\u89e3\uff1a\u5b83\u7684\u9ad8\u662fx\u7c73
x(7+11)=90*2
18x=180
x=10
\u5b83\u7684\u9ad8\u662f10\u7c73
3\u3001\u67d0\u8f66\u95f4\u8ba1\u5212\u56db\u6708\u4efd\u751f\u4ea7\u96f6\u4ef65480\u4e2a\u3002\u5df2\u751f\u4ea7\u4e869\u5929\uff0c\u518d\u751f\u4ea7908\u4e2a\u5c31\u80fd\u5b8c\u6210\u751f\u4ea7\u8ba1\u5212\uff0c\u8fd99\u5929\u4e2d\u5e73\u5747\u6bcf\u5929\u751f\u4ea7\u591a\u5c11\u4e2a\uff1f
\u8fd99\u5929\u4e2d\u5e73\u5747\u6bcf\u5929\u751f\u4ea7x\u4e2a
9x+908=5408
9x=4500
x=500
\u8fd99\u5929\u4e2d\u5e73\u5747\u6bcf\u5929\u751f\u4ea7500\u4e2a
4\u3001\u7532\u4e59\u4e24\u8f66\u4ece\u76f8\u8ddd272\u5343\u7c73\u7684\u4e24\u5730\u540c\u65f6\u76f8\u5411\u800c\u884c\uff0c3\u5c0f\u65f6\u540e\u4e24\u8f66\u8fd8\u76f8\u969417\u5343\u7c73\u3002\u7532\u6bcf\u5c0f\u65f6\u884c45\u5343\u7c73\uff0c\u4e59\u6bcf\u5c0f\u65f6\u884c\u591a\u5c11\u5343\u7c73\uff1f
\u4e59\u6bcf\u5c0f\u65f6\u884cx\u5343\u7c73
3(45+x)+17=272
3(45+x)=255
45+x=85
x=40
\u4e59\u6bcf\u5c0f\u65f6\u884c40\u5343\u7c73
5\u3001\u67d0\u6821\u516d\u5e74\u7ea7\u6709\u4e24\u4e2a\u73ed\uff0c\u4e0a\u5b66\u671f\u7ea7\u6570\u5b66\u5e73\u5747\u6210\u7ee9\u662f85\u5206\u3002\u5df2\u77e5\u516d\uff081\uff09\u73ed40\u4eba\uff0c\u5e73\u5747\u6210\u7ee9\u4e3a87.1\u5206\uff1b\u516d\uff082\uff09\u73ed\u670942\u4eba\uff0c\u5e73\u5747\u6210\u7ee9\u662f\u591a\u5c11\u5206\uff1f
\u5e73\u5747\u6210\u7ee9\u662fx\u5206
40*87.1+42x=85*82
3484+42x=6970
42x=3486
x=83
\u5e73\u5747\u6210\u7ee9\u662f83\u5206
6\u3001\u5b66\u6821\u4e70\u676510\u7bb1\u7c89\u7b14\uff0c\u7528\u53bb250\u76d2\u540e\uff0c\u8fd8\u5269\u4e0b550\u76d2\uff0c\u5e73\u5747\u6bcf\u7bb1\u591a\u5c11\u76d2\uff1f
\u5e73\u5747\u6bcf\u7bb1x\u76d2
10x=250+550
10x=800
x=80
\u5e73\u5747\u6bcf\u7bb180\u76d2
7\u3001\u56db\u5e74\u7ea7\u5171\u6709\u5b66\u751f200\u4eba\uff0c\u8bfe\u5916\u6d3b\u52a8\u65f6\uff0c80\u540d\u5973\u751f\u90fd\u53bb\u8df3\u7ef3\u3002\u7537\u751f\u5206\u62105\u7ec4\u53bb\u8e22\u8db3\u7403\uff0c\u5e73\u5747\u6bcf\u7ec4\u591a\u5c11\u4eba\uff1f
\u5e73\u5747\u6bcf\u7ec4x\u4eba
5x+80=200
5x=160
x=32
\u5e73\u5747\u6bcf\u7ec432\u4eba
8\u3001\u98df\u5802\u8fd0\u6765150\u5343\u514b\u5927\u7c73\uff0c\u6bd4\u8fd0\u6765\u7684\u9762\u7c89\u76843\u500d\u5c1130\u5343\u514b\u3002\u98df\u5802\u8fd0\u6765\u9762\u7c89\u591a\u5c11\u5343\u514b\uff1f
\u98df\u5802\u8fd0\u6765\u9762\u7c89x\u5343\u514b
3x-30=150
3x=180
x=60
\u98df\u5802\u8fd0\u6765\u9762\u7c8960\u5343\u514b
9\u3001\u679c\u56ed\u91cc\u670952\u68f5\u6843\u6811\uff0c\u67096\u884c\u68a8\u6811\uff0c\u68a8\u6811\u6bd4\u6843\u6811\u591a20\u68f5\u3002\u5e73\u5747\u6bcf\u884c\u68a8\u6811\u6709\u591a\u5c11\u68f5\uff1f
\u5e73\u5747\u6bcf\u884c\u68a8\u6811\u6709x\u68f5
6x-52=20
6x=72
x=12
\u5e73\u5747\u6bcf\u884c\u68a8\u6811\u670912\u68f5
10\u3001\u4e00\u5757\u4e09\u89d2\u5f62\u5730\u7684\u9762\u79ef\u662f840\u5e73\u65b9\u7c73\uff0c\u5e95\u662f140\u7c73\uff0c\u9ad8\u662f\u591a\u5c11\u7c73\uff1f
\u9ad8\u662fx\u7c73
140x=840*2
140x=1680
x=12
\u9ad8\u662f12\u7c73
11\u3001\u674e\u5e08\u5085\u4e70\u676572\u7c73\u5e03\uff0c\u6b63\u597d\u505a20\u4ef6\u5927\u4eba\u8863\u670d\u548c16\u4ef6\u513f\u7ae5\u8863\u670d\u3002\u6bcf\u4ef6\u5927\u4eba\u8863\u670d\u75282.4\u7c73\uff0c\u6bcf\u4ef6\u513f\u7ae5\u8863\u670d\u7528\u5e03\u591a\u5c11\u7c73\uff1f
\u6bcf\u4ef6\u513f\u7ae5\u8863\u670d\u7528\u5e03x\u7c73
16x+20*2.4=72
16x=72-48
16x=24
x=1.5
\u6bcf\u4ef6\u513f\u7ae5\u8863\u670d\u7528\u5e031.5\u7c73
12\u30013\u5e74\u524d\u6bcd\u4eb2\u5c81\u6570\u662f\u5973\u513f\u76846\u500d\uff0c\u4eca\u5e74\u6bcd\u4eb233\u5c81\uff0c\u5973\u513f\u4eca\u5e74\u51e0\u5c81\uff1f
\u5973\u513f\u4eca\u5e74x\u5c81
30=6(x-3)
6x-18=30
6x=48
x=8
\u5973\u513f\u4eca\u5e748\u5c81
13\u3001\u4e00\u8f86\u65f6\u901f\u662f50\u5343\u7c73\u7684\u6c7d\u8f66\uff0c\u9700\u8981\u591a\u5c11\u65f6\u95f4\u624d\u80fd\u8ffd\u4e0a2\u5c0f\u65f6\u524d\u5f00\u51fa\u7684\u4e00\u8f86\u65f6\u901f\u4e3a40\u5343\u7c73\u6c7d\u8f66\uff1f
\u9700\u8981x\u65f6\u95f4
50x=40x+80
10x=80
x=8
\u9700\u89818\u65f6\u95f4
14\u3001\u5c0f\u4e1c\u5230\u6c34\u679c\u5e97\u4e70\u4e863\u5343\u514b\u7684\u82f9\u679c\u548c2\u5343\u514b\u7684\u68a8\u5171\u4ed815\u5143\uff0c1\u5343\u514b\u82f9\u679c\u6bd41\u5343\u514b\u68a8\u8d350.5\u5143\uff0c\u82f9\u679c\u548c\u68a8\u6bcf\u5343\u514b\u5404\u591a\u5c11\u5143\uff1f
\u82f9\u679cx
3x+2(x-0.5)=15
5x=16
x=3.2
\u82f9\u679c:3.2
\u68a8:2.7
15\u3001\u7532\u3001\u4e59\u4e24\u8f66\u5206\u522b\u4eceA\u3001B\u4e24\u5730\u540c\u65f6\u51fa\u53d1\uff0c\u76f8\u5411\u800c\u884c\uff0c\u7532\u6bcf\u5c0f\u65f6\u884c50\u5343\u7c73\uff0c\u4e59\u6bcf\u5c0f\u65f6\u884c40\u5343\u7c73\uff0c\u7532\u6bd4\u4e59\u65e91\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9\u3002\u7532\u51e0\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9\uff1f
\u7532x\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9
50x=40(x+1)
10x=40
x=4
\u75324\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9
16\u3001\u7532\u3001\u4e59\u4e24\u4eba\u5206\u522b\u4eceA\u3001B\u4e24\u5730\u540c\u65f6\u51fa\u53d1\uff0c\u76f8\u5411\u800c\u884c\uff0c2\u5c0f\u65f6\u76f8\u9047\u3002\u5982\u679c\u7532\u4eceA\u5730\uff0c\u4e59\u4eceB\u5730\u540c\u65f6\u51fa\u53d1\uff0c\u540c\u5411\u800c\u884c\uff0c\u90a3\u4e484\u5c0f\u65f6\u540e\u7532\u8ffd\u4e0a\u4e59\u3002\u5df2\u77e5\u7532\u901f\u5ea6\u662f15\u5343\u7c73/\u65f6\uff0c\u6c42\u4e59\u7684\u901f\u5ea6\u3002
\u4e59\u7684\u901f\u5ea6x
2(x+15)+4x=60
2x+30+4x=60
6x=30
x=5
\u4e59\u7684\u901f\u5ea65
17\uff0e\u4e24\u6839\u540c\u6837\u957f\u7684\u7ef3\u5b50\uff0c\u7b2c\u4e00\u6839\u526a\u53bb15\u7c73\uff0c\u7b2c\u4e8c\u6839\u6bd4\u7b2c\u4e00\u6839\u5269\u4e0b\u76843\u500d\u8fd8\u591a3\u7c73\u3002\u95ee\u539f\u6765\u4e24\u6839\u7ef3\u5b50\u5404\u957f\u51e0\u7c73\uff1f
\u539f\u6765\u4e24\u6839\u7ef3\u5b50\u5404\u957fx\u7c73
3(x-15)+3=x
3x-45+3=x
2x=42
x=21
\u539f\u6765\u4e24\u6839\u7ef3\u5b50\u5404\u957f21\u7c73
18\uff0e\u67d0\u6821\u4e70\u67657\u53ea\u7bee\u7403\u548c10\u53ea\u8db3\u7403\u5171\u4ed8248\u5143\u3002\u5df2\u77e5\u6bcf\u53ea\u7bee\u7403\u4e0e\u4e09\u53ea\u8db3\u7403\u4ef7\u94b1\u76f8\u7b49\uff0c\u95ee\u6bcf\u53ea\u7bee\u7403\u548c\u8db3\u7403\u5404\u591a\u5c11\u5143\uff1f
\u6bcf\u53ea\u7bee\u7403x
7x+10x/3=248
21x+10x=744
31x=744
x=24
\u6bcf\u53ea\u7bee\u7403:24
\u6bcf\u53ea\u8db3\u7403:8
1\u3001\u8fd0\u900129.5\u5428\u7164\uff0c\u5148\u7528\u4e00\u8f86\u8f7d\u91cd4\u5428\u7684\u6c7d\u8f66\u8fd03\u6b21\uff0c\u5269\u4e0b\u7684\u7528\u4e00\u8f86\u8f7d\u91cd\u4e3a2.5\u5428\u7684\u8d27\u8f66\u8fd0\u3002\u8fd8\u8981\u8fd0\u51e0\u6b21\u624d\u80fd\u5b8c\uff1f
\u8fd8\u8981\u8fd0x\u6b21\u624d\u80fd\u5b8c
29.5-3*4=2.5x
17.5=2.5x
x=7
\u8fd8\u8981\u8fd07\u6b21\u624d\u80fd\u5b8c
2\u3001\u4e00\u5757\u68af\u5f62\u7530\u7684\u9762\u79ef\u662f90\u5e73\u65b9\u7c73\uff0c\u4e0a\u5e95\u662f7\u7c73\uff0c\u4e0b\u5e95\u662f11\u7c73\uff0c\u5b83\u7684\u9ad8\u662f\u51e0\u7c73\uff1f
\u5b83\u7684\u9ad8\u662fx\u7c73
x(7+11)=90*2
18x=180
x=10
\u5b83\u7684\u9ad8\u662f10\u7c73
3\u3001\u67d0\u8f66\u95f4\u8ba1\u5212\u56db\u6708\u4efd\u751f\u4ea7\u96f6\u4ef65480\u4e2a\u3002\u5df2\u751f\u4ea7\u4e869\u5929\uff0c\u518d\u751f\u4ea7908\u4e2a\u5c31\u80fd\u5b8c\u6210\u751f\u4ea7\u8ba1\u5212\uff0c\u8fd99\u5929\u4e2d\u5e73\u5747\u6bcf\u5929\u751f\u4ea7\u591a\u5c11\u4e2a\uff1f
\u8fd99\u5929\u4e2d\u5e73\u5747\u6bcf\u5929\u751f\u4ea7x\u4e2a
9x+908=5408
9x=4500
x=500
\u8fd99\u5929\u4e2d\u5e73\u5747\u6bcf\u5929\u751f\u4ea7500\u4e2a
4\u3001\u7532\u4e59\u4e24\u8f66\u4ece\u76f8\u8ddd272\u5343\u7c73\u7684\u4e24\u5730\u540c\u65f6\u76f8\u5411\u800c\u884c\uff0c3\u5c0f\u65f6\u540e\u4e24\u8f66\u8fd8\u76f8\u969417\u5343\u7c73\u3002\u7532\u6bcf\u5c0f\u65f6\u884c45\u5343\u7c73\uff0c\u4e59\u6bcf\u5c0f\u65f6\u884c\u591a\u5c11\u5343\u7c73\uff1f
\u4e59\u6bcf\u5c0f\u65f6\u884cx\u5343\u7c73
3(45+x)+17=272
3(45+x)=255
45+x=85
x=40
\u4e59\u6bcf\u5c0f\u65f6\u884c40\u5343\u7c73
5\u3001\u67d0\u6821\u516d\u5e74\u7ea7\u6709\u4e24\u4e2a\u73ed\uff0c\u4e0a\u5b66\u671f\u7ea7\u6570\u5b66\u5e73\u5747\u6210\u7ee9\u662f85\u5206\u3002\u5df2\u77e5\u516d\uff081\uff09\u73ed40\u4eba\uff0c\u5e73\u5747\u6210\u7ee9\u4e3a87.1\u5206\uff1b\u516d\uff082\uff09\u73ed\u670942\u4eba\uff0c\u5e73\u5747\u6210\u7ee9\u662f\u591a\u5c11\u5206\uff1f
\u5e73\u5747\u6210\u7ee9\u662fx\u5206
40*87.1+42x=85*82
3484+42x=6970
42x=3486
x=83
\u5e73\u5747\u6210\u7ee9\u662f83\u5206
6\u3001\u5b66\u6821\u4e70\u676510\u7bb1\u7c89\u7b14\uff0c\u7528\u53bb250\u76d2\u540e\uff0c\u8fd8\u5269\u4e0b550\u76d2\uff0c\u5e73\u5747\u6bcf\u7bb1\u591a\u5c11\u76d2\uff1f
\u5e73\u5747\u6bcf\u7bb1x\u76d2
10x=250+550
10x=800
x=80
\u5e73\u5747\u6bcf\u7bb180\u76d2
7\u3001\u56db\u5e74\u7ea7\u5171\u6709\u5b66\u751f200\u4eba\uff0c\u8bfe\u5916\u6d3b\u52a8\u65f6\uff0c80\u540d\u5973\u751f\u90fd\u53bb\u8df3\u7ef3\u3002\u7537\u751f\u5206\u62105\u7ec4\u53bb\u8e22\u8db3\u7403\uff0c\u5e73\u5747\u6bcf\u7ec4\u591a\u5c11\u4eba\uff1f
\u5e73\u5747\u6bcf\u7ec4x\u4eba
5x+80=200
5x=160
x=32
\u5e73\u5747\u6bcf\u7ec432\u4eba
8\u3001\u98df\u5802\u8fd0\u6765150\u5343\u514b\u5927\u7c73\uff0c\u6bd4\u8fd0\u6765\u7684\u9762\u7c89\u76843\u500d\u5c1130\u5343\u514b\u3002\u98df\u5802\u8fd0\u6765\u9762\u7c89\u591a\u5c11\u5343\u514b\uff1f
\u98df\u5802\u8fd0\u6765\u9762\u7c89x\u5343\u514b
3x-30=150
3x=180
x=60
\u98df\u5802\u8fd0\u6765\u9762\u7c8960\u5343\u514b
9\u3001\u679c\u56ed\u91cc\u670952\u68f5\u6843\u6811\uff0c\u67096\u884c\u68a8\u6811\uff0c\u68a8\u6811\u6bd4\u6843\u6811\u591a20\u68f5\u3002\u5e73\u5747\u6bcf\u884c\u68a8\u6811\u6709\u591a\u5c11\u68f5\uff1f
\u5e73\u5747\u6bcf\u884c\u68a8\u6811\u6709x\u68f5
6x-52=20
6x=72
x=12
\u5e73\u5747\u6bcf\u884c\u68a8\u6811\u670912\u68f5
10\u3001\u4e00\u5757\u4e09\u89d2\u5f62\u5730\u7684\u9762\u79ef\u662f840\u5e73\u65b9\u7c73\uff0c\u5e95\u662f140\u7c73\uff0c\u9ad8\u662f\u591a\u5c11\u7c73\uff1f
\u9ad8\u662fx\u7c73
140x=840*2
140x=1680
x=12
\u9ad8\u662f12\u7c73
11\u3001\u674e\u5e08\u5085\u4e70\u676572\u7c73\u5e03\uff0c\u6b63\u597d\u505a20\u4ef6\u5927\u4eba\u8863\u670d\u548c16\u4ef6\u513f\u7ae5\u8863\u670d\u3002\u6bcf\u4ef6\u5927\u4eba\u8863\u670d\u75282.4\u7c73\uff0c\u6bcf\u4ef6\u513f\u7ae5\u8863\u670d\u7528\u5e03\u591a\u5c11\u7c73\uff1f
\u6bcf\u4ef6\u513f\u7ae5\u8863\u670d\u7528\u5e03x\u7c73
16x+20*2.4=72
16x=72-48
16x=24
x=1.5
\u6bcf\u4ef6\u513f\u7ae5\u8863\u670d\u7528\u5e031.5\u7c73
12\u30013\u5e74\u524d\u6bcd\u4eb2\u5c81\u6570\u662f\u5973\u513f\u76846\u500d\uff0c\u4eca\u5e74\u6bcd\u4eb233\u5c81\uff0c\u5973\u513f\u4eca\u5e74\u51e0\u5c81\uff1f
\u5973\u513f\u4eca\u5e74x\u5c81
30=6(x-3)
6x-18=30
6x=48
x=8
\u5973\u513f\u4eca\u5e748\u5c81
13\u3001\u4e00\u8f86\u65f6\u901f\u662f50\u5343\u7c73\u7684\u6c7d\u8f66\uff0c\u9700\u8981\u591a\u5c11\u65f6\u95f4\u624d\u80fd\u8ffd\u4e0a2\u5c0f\u65f6\u524d\u5f00\u51fa\u7684\u4e00\u8f86\u65f6\u901f\u4e3a40\u5343\u7c73\u6c7d\u8f66\uff1f
\u9700\u8981x\u65f6\u95f4
50x=40x+80
10x=80
x=8
\u9700\u89818\u65f6\u95f4
14\u3001\u5c0f\u4e1c\u5230\u6c34\u679c\u5e97\u4e70\u4e863\u5343\u514b\u7684\u82f9\u679c\u548c2\u5343\u514b\u7684\u68a8\u5171\u4ed815\u5143\uff0c1\u5343\u514b\u82f9\u679c\u6bd41\u5343\u514b\u68a8\u8d350.5\u5143\uff0c\u82f9\u679c\u548c\u68a8\u6bcf\u5343\u514b\u5404\u591a\u5c11\u5143\uff1f
\u82f9\u679cx
3x+2(x-0.5)=15
5x=16
x=3.2
\u82f9\u679c:3.2
\u68a8:2.7
15\u3001\u7532\u3001\u4e59\u4e24\u8f66\u5206\u522b\u4eceA\u3001B\u4e24\u5730\u540c\u65f6\u51fa\u53d1\uff0c\u76f8\u5411\u800c\u884c\uff0c\u7532\u6bcf\u5c0f\u65f6\u884c50\u5343\u7c73\uff0c\u4e59\u6bcf\u5c0f\u65f6\u884c40\u5343\u7c73\uff0c\u7532\u6bd4\u4e59\u65e91\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9\u3002\u7532\u51e0\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9\uff1f
\u7532x\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9
50x=40(x+1)
10x=40
x=4
\u75324\u5c0f\u65f6\u5230\u8fbe\u4e2d\u70b9
16\u3001\u7532\u3001\u4e59\u4e24\u4eba\u5206\u522b\u4eceA\u3001B\u4e24\u5730\u540c\u65f6\u51fa\u53d1\uff0c\u76f8\u5411\u800c\u884c\uff0c2\u5c0f\u65f6\u76f8\u9047\u3002\u5982\u679c\u7532\u4eceA\u5730\uff0c\u4e59\u4eceB\u5730\u540c\u65f6\u51fa\u53d1\uff0c\u540c\u5411\u800c\u884c\uff0c\u90a3\u4e484\u5c0f\u65f6\u540e\u7532\u8ffd\u4e0a\u4e59\u3002\u5df2\u77e5\u7532\u901f\u5ea6\u662f15\u5343\u7c73/\u65f6\uff0c\u6c42\u4e59\u7684\u901f\u5ea6\u3002
\u4e59\u7684\u901f\u5ea6x
2(x+15)+4x=60
2x+30+4x=60
6x=30
x=5
\u4e59\u7684\u901f\u5ea65
17\uff0e\u4e24\u6839\u540c\u6837\u957f\u7684\u7ef3\u5b50\uff0c\u7b2c\u4e00\u6839\u526a\u53bb15\u7c73\uff0c\u7b2c\u4e8c\u6839\u6bd4\u7b2c\u4e00\u6839\u5269\u4e0b\u76843\u500d\u8fd8\u591a3\u7c73\u3002\u95ee\u539f\u6765\u4e24\u6839\u7ef3\u5b50\u5404\u957f\u51e0\u7c73\uff1f
\u539f\u6765\u4e24\u6839\u7ef3\u5b50\u5404\u957fx\u7c73
3(x-15)+3=x
3x-45+3=x
2x=42
x=21
\u539f\u6765\u4e24\u6839\u7ef3\u5b50\u5404\u957f21\u7c73
18\uff0e\u67d0\u6821\u4e70\u67657\u53ea\u7bee\u7403\u548c10\u53ea\u8db3\u7403\u5171\u4ed8248\u5143\u3002\u5df2\u77e5\u6bcf\u53ea\u7bee\u7403\u4e0e\u4e09\u53ea\u8db3\u7403\u4ef7\u94b1\u76f8\u7b49\uff0c\u95ee\u6bcf\u53ea\u7bee\u7403\u548c\u8db3\u7403\u5404\u591a\u5c11\u5143\uff1f
\u6bcf\u53ea\u7bee\u7403x
7x+10x/3=248
21x+10x=744
31x=744
x=24
\u6bcf\u53ea\u7bee\u7403:24
\u6bcf\u53ea\u8db3\u7403:8
1\u3001\u8fd0\u4e00\u6279\u8d27\u7269\uff0c\u4e00\u76f4\u8fc7\u53bb\u4e24\u6b21\u79df\u7528\u8fd9\u4e24\u53f0\u5927\u8d27\u8f66\u60c5\u51b5\uff1a\u7b2c\u4e00\u6b21 \u7532\u79cd\u8f662\u8f86\uff0c\u4e59\u79cd\u8f663\u8f86\uff0c\u8fd0\u4e8615.5\u5428 \u7b2c\u4e8c\u6b21 \u7532\u79cd\u8f665\u8f86 \u4e59\u79cd\u8f666\u8f86 \u8fd0\u4e8635\u5428\u8d27\u7269 \u73b0\u79df\u7528\u8be5\u516c\u53f83\u8f86\u7532\u79cd\u8f66\u548c5\u8f86\u4e59\u79cd\u8f66 \u5982\u679c\u6309\u6bcf\u5428\u4ed8\u8fd0\u8d3930\u5143 \u95ee\u8d27\u4e3b\u5e94\u4ed8\u591a\u5c11\u5143
\u89e3\uff1a\u8bbe\u7532\u53ef\u4ee5\u88c5x\u5428\uff0c\u4e59\u53ef\u4ee5\u88c5y\u5428\uff0c\u5219
2x+3y=15.5
5x+6y=35
\u5f97\u5230x=4
y=2.5
\u5f97\u5230\uff083x+5y\uff09*30=735
2\u3001\u73b0\u5bf9\u67d0\u5546\u54c1\u964d\u4ef710%\u4fc3\u9500.\u4e3a\u4e86\u4f7f\u9500\u552e\u603b\u91d1\u989d\u4e0d\u53d8.\u9500\u552e\u91cf\u8981\u6bd4\u6309\u539f\u4ef7\u9500\u552e\u65f6\u589e\u52a0\u767e\u5206\u4e4b\u51e0\uff1f
\u89e3\uff1a\u539f\u4ef7\u9500\u552e\u65f6\u589e\u52a0X%
(1-10%)*(1+X%)=1
X%=11.11%
\u4e3a\u4e86\u4f7f\u9500\u552e\u603b\u91d1\u989d\u4e0d\u53d8.\u9500\u552e\u91cf\u8981\u6bd4\u6309\u539f\u4ef7\u9500\u552e\u65f6\u589e\u52a011.11%
3\u30011\u4e2a\u5546\u54c1\u964d\u4ef710%\u540e\u7684\u4ef7\u683c\u6070\u597d\u6bd4\u539f\u4ef7\u7684\u4e00\u534a\u591a40\u5143,\u95ee\u8be5\u5546\u54c1\u539f\u4ef7\u662f\u591a\u5c11?
\u89e3\uff1a\u8bbe\u539f\u4ef7\u4e3ax\u5143
(1-10%)x-40=0.5x
x=100
\u7b54\uff1a\u539f\u4ef7\u4e3a100\u5143
4\u3001\u6709\u542b\u76d08%\u7684\u76d0\u6c3440\u514b\uff0c\u8981\u4f7f\u76d0\u6c34\u542b\u76d020%\uff0c\u5219\u9700\u52a0\u76d0\u591a\u5c11\u514b\uff1f
\u89e3\uff1a\u8bbe\u52a0\u76d0x\u514b
\u5f00\u59cb\u7eaf\u76d0\u662f40*8%\u514b
\u52a0\u4e86x\u514b\u662f40*8%+x
\u76d0\u6c34\u662f40+x\u514b
\u6d53\u5ea620%
\u6240\u4ee5(40*8%+x)/(40+x)=20%
(3.2+x)/(40+x)=0.2
3.2+x=8+0.2x
0.8x=4.8
x=6
\u6240\u4ee5\u52a0\u76d06\u514b
5\u3001\u67d0\u5e02\u573a\u9e21\u86cb\u4e70\u5356\u6309\u4e2a\u6570\u8ba1\u4ef7\uff0c\u4e00\u5546\u8d29\u4ee5\u6bcf\u4e2a0.24\u5143\u8d2d\u8fdb\u4e00\u6279\u9e21\u86cb\uff0c\u4f46\u5728\u8d29\u8fd0\u9014\u4e2d\u4e0d\u614e\u78b0\u788e\u4e8612\u4e2a\uff0c\u5269\u4e0b\u7684\u86cb\u4ee5\u6bcf\u4e2a0.28\u5143\u552e\u51fa\uff0c\u7ed3\u679c\u4ecd\u83b7\u522911.2\u5143\u3002\u95ee\u8be5\u5546\u8d29\u5f53\u521d\u4e70\u8fdb\u591a\u5c11\u4e2a\u9e21\u86cb\uff1f
\u89e3\uff1a\u8bbe\u8be5\u5546\u8d29\u5f53\u521d\u4e70\u8fdbX\u4e2a\u9e21\u86cb.
\u6839\u636e\u9898\u610f\u5217\u51fa\u65b9\u7a0b:
(X-12)*0.28-0.24X=11.2
0.28X-3.36-0.24X=11.2
0.04X=14.56
X=364
\u7b54:\u8be5\u5546\u8d29\u5f53\u521d\u4e70\u8fdb364\u4e2a\u9e21\u86cb.
6\u3001\u67d0\u8f66\u95f4\u6709\u6280\u5de585\u4eba\uff0c\u5e73\u5747\u6bcf\u5929\u6bcf\u4eba\u53ef\u52a0\u5de5\u7532\u79cd\u90e8\u4ef615\u4e2a\u6216\u4e59\u79cd\u90e8\u4ef610\u4e2a\uff0c2\u4e2a\u7532\u79cd\u90e8\u4ef6\u548c3\u4e2a\u4e59\u79cd\u90e8\u4ef6\u914d\u4e00\u5957\uff0c\u95ee\u52a0\u5de5\u7532\u3001\u4e59\u90e8\u4ef6\u5404\u5b89\u6392\u591a\u5c11\u4eba\u624d\u80fd\u4f7f\u6bcf\u5929\u52a0\u5de5\u7684\u7532\u3001\u4e59\u4e24\u79cd\u90e8\u4ef6\u521a\u597d\u914d\u5957\uff1f
\u89e3\uff1a\u8bbe\u5b89\u6392\u751f\u4ea7\u7532\u7684\u9700\u8981x\u4eba\uff0c\u90a3\u4e48\u751f\u4ea7\u4e59\u7684\u6709\uff0885\uff0dx)\u4eba
\u56e0\u4e3a2\u4e2a\u7532\u79cd\u90e8\u4ef6\u548c3\u4e2a\u4e59\u79cd\u90e8\u4ef6\u914d\u4e00\u5957\uff0c\u6240\u4ee5
\u6240\u4ee5\u751f\u4ea7\u7684\u7532\u90e8\u4ef6\u4e58\u4ee53\u624d\u80fd\u7b49\u4e8e\u4e59\u90e8\u4ef6\u4e58\u4ee52\u7684\u6570\u91cf
16*x*3\uff1d10*(85-x)*2
\u89e3\u5f97\uff1ax=25
\u751f\u4ea7\u7532\u7684\u9700\u898125\u4eba\uff0c\u751f\u4ea7\u4e59\u7684\u9700\u898160\u4eba\uff01
7\u3001\u7ea2\u5149\u7535\u5668\u5546\u884c\u628a\u67d0\u79cd\u5f69\u7535\u6309\u6807\u4ef7\u7684\u516b\u6298\u51fa\u552e\uff0c\u4ecd\u53ef\u83b7\u522920%\u3002\u5df2\u77e5\u8fd9\u79cd\u5f69\u7535\u6bcf\u53f0\u8fdb\u4ef71996\u5143\u3002\u90a3\u4e48\u8fd9\u79cd\u5f69\u7535\u6bcf\u53f0\u6807\u4ef7\u5e94\u4e3a\u591a\u5c11\u5143\uff1f
\u89e3\uff1a\u8bbe\u6807\u4ef7\u4e3aX\u5143.
80%X=1996\u00d7(1+20%)
80%X= 2395.2
X=2994
8\u3001\u67d0\u5546\u5e97\u628a\u67d0\u79cd\u5546\u54c1\u6309\u6807\u4ef7\u76848\u6298\u51fa\u552e\uff0c\u53ef\u83b7\u522920%\u3002\u82e5\u8be5\u5546\u54c1\u7684\u8fdb\u4ef7\u4e3a\u6bcf\u4ef622\u5143\uff0c\u5219\u6bcf\u4ef6\u5546\u54c1\u7684\u6807\u4ef7\u4e3a\u591a\u5c11\u5143\uff1f
\u89e3\uff1a:\u8bbe\u6807\u4ef7\u4e3aX\u5143.
80%X=22\u00d7(1+20%)
80%X= 26.4
X=33
9\u3001\u5728\u4e00\u6bb5\u53cc\u8f68\u94c1\u9053\u4e0a\uff0c\u4e24\u5217\u706b\u8f66\u8fce\u5934\u9a76\u8fc7\uff0cA\u5217\u8f66\u8f66\u901f\u4e3a20m/s\uff0cB\u5217\u8f66\u8f66\u901f\u4e3a24m/s\uff0c\u82e5A\u5217\u8f66\u5168\u957f180m\uff0cB\u5217\u8f66\u5168\u957f160m\uff0c\u95ee\u4e24\u5217\u8f66\u9519\u8f66\u7684\u65f6\u95f4\u4e3a\u591a\u5c11\u79d2\uff1f
\u89e3\uff1a(180+160)/(20+24)=7.28\u79d2
10\u3001\u7532\u4e59\u4e24\u540d\u540c\u5b66\u5728\u540c\u4e00\u9053\u8def\u4e0a\u4ece\u76f8\u8ddd5km\u7684\u4e24\u5730\u540c\u5411\u800c\u884c\uff0c\u7532\u7684\u901f\u5ea6\u4e3a5km/h\uff0c\u4e59\u7684\u901f\u5ea6\u4e3a3km/h\uff0c\u7532\u540c\u5b66\u5e26\u7740\u4e00\u6761\u72d7\uff0c\u5f53\u7532\u8ffd\u4e59\u65f6\uff0c\u72d7\u5148\u8ffd\u4e59\uff0c\u518d\u8fd4\u56de\u9047\u4e0a\u7532\uff0c\u53c8\u8fd4\u56de\u8ffd\u4e59\uff0c\u2026\u2026\u76f4\u5230\u7532\u8ffd\u5230\u4e59\u4e3a\u6b62\u3002\u5df2\u77e5\u72d7\u7684\u901f\u5ea6\u4e3a15km/h\uff0c\u6c42\u6b64\u8fc7\u7a0b\u4e2d\uff0c\u72d7\u8dd1\u7684\u603b\u8def\u7a0b\u3002
\u89e3\uff1a\u9996\u5148\u8981\u660e\u786e,\u7532\u4e59\u7684\u76f8\u9047\u65f6\u95f4\u7b49\u4e8e\u72d7\u6765\u56de\u8dd1\u7684\u65f6\u95f4
\u6240\u4ee5\u72d7\u7684\u65f6\u95f4=\u7532\u4e59\u76f8\u9047\u65f6\u95f4=\u603b\u8def\u7a0b/\u7532\u4e59\u901f\u5ea6\u548c
=5km/(5km/h+3km/h)=5/8h
\u6240\u4ee5\u72d7\u7684\u8def\u7a0b=\u72d7\u7684\u65f6\u95f4*\u72d7\u7684\u901f\u5ea6=5/8h*15km/h=75/8km
\u6240\u4ee5\u7532\u4e59\u76f8\u9047\u72d7\u8d70\u4e8675/8\u5343\u7c73
\u4e00\u5929\u5c0f\u7ea2\u548c\u5c0f\u4eae2\u4eba\u5229\u7528\u6e29\u5ea6\u5dee\u6d4b\u91cf\u67d0\u5c71\u5cf0\u7684\u9ad8\u5ea6\uff0c\u5c0f\u7ea2\u5728\u5c71\u9876\u4fa7\u7684\u6e29\u5ea6\u662f-1\u5ea6 \u5c0f\u4eae\u6b64\u65f6\u5728\u5c71\u811a\u4e0b\u6d4b\u5f97\u7684\u6e29\u5ea6\u662f5\u5ea6 \u5df2\u77e5\u8be5\u5730
\u533a\u7684\u9ad8\u5ea6\u6bcf\u589e\u52a0100M\uff0c\u6c14\u6e29\u5927\u7ea6\u4e0b\u964d0.6\u5ea6 \u8fd9\u5ea7\u5c71\u5cf0\u7684\u9ad8\u5ea6\u662f\uff1f
\u5f53\u6c14\u6e29\u6bcf\u4e0a\u53471\u5ea6\u65f6\uff0c\u67d0\u79cd\u91d1\u5c5e\u4e1d\u4f38\u957f0.002MM \u53cd\u4e4b\uff0c \u5f53\u6e29\u5ea6\u6bcf\u4e0b\u964d1\u5ea6\u65f6\uff0c\u91d1\u5c5e\u4e1d\u7f29\u77ed0.002MM\u3002\u628a15\u5ea6\u7684\u91d1\u5c5e\u4e1d\u52a0\u70ed\u523060\u5ea6\uff0c\u5728\u4f7f\u5b83\u51b7\u5374\u964d\u6e29\u52305\u5ea6\uff0c\u91d1\u5c5e\u4e1d\u7684\u957f\u5ea6\u7ecf\u5386\u4e86\u600e\u6837\u7684\u53d8\u5316\uff1f \u6700\u540e\u7684\u957f\u5ea6\u6bd4\u539f\u6765\u957f\u5ea6\u4f38\u957f\u591a\u5c11\uff1f
\u4e00\u79cd\u51fa\u79df\u8f66\u7684\u6536\u8d39\u65b9\u5f0f\u5982\u4e0b\uff1a4\u5343\u7c73\u4ee5\u518510\u5143\uff0c4\u5343\u7c73\u81f315\u5343\u7c73\u90e8\u5206\u6bcf\u5343\u7c73\u52a0\u65361.2\u5143\uff0c15\u5343\u7c73\u4ee5\u4e0a\u90e8\u5206\u6bcf\u5343\u7c73\u52a0\u65361.6\u5143\uff0c\u67d0\u4e58\u5ba2\u8981\u4e58\u51fa\u79df\u8f66\u53bb50\u5343\u7c73\u5904\u7684\u67d0\u5730\uff0e
\uff081\uff09\u5982\u679c\u4e58\u5ba2\u4e2d\u9014\u4e0d\u6362\u8f66\u8981\u4ed8\u8f66\u8d39\u591a\u5c11\u5143\uff1f
\uff082\uff09\u5982\u679c\u4e2d\u9014\u4e58\u5ba2\u6362\u4e58\u4e00\u8f86\u51fa\u79df\u8f66\uff0c\u4ed6\u5728\u4f55\u5904\u6362\u6bd4\u8f83\u5408\u7b97\uff1f\u7b97\u51fa\u603b\u8d39\u7528\u4e0e\uff081\uff09\u6bd4\u8f83\uff0e
\u5df2\u77e5\u5f00\u76d8\u662f25.35,\u6536\u76d8\u662f27.38,\u6c42\u5f00\u76d8\u90fd\u6536\u76d8\u4e0a\u6da8\u7684\u767e\u5206\u6bd4.
\uff0827.38-25.35)\u00d7100%\u00f725.35\u22488%
\u8d2d\u7968\u4eba 50\u4eba\u4ee5\u4e0b 50-100\u4eba 100\u4eba\u4ee5\u4e0a
\u6bcf\u4eba\u95e8\u7968\u4ef7 12\u5143 10\u5143 8\u5143
\u73b0\u6709\u7532\u4e59\u4e24\u4e2a\u65c5\u6e38\u56e2\uff0c\u82e5\u5206\u522b\u8d2d\u7968\uff0c\u4e24\u56e2\u5e94\u4ed8\u95e8\u7968\u8d39\u603b\u8ba11142\u5143\uff0c\u5982\u5408\u5728\u4e00\u8d77\u4f5c\u4e3a\u4e00\u4e2a\u56e2\u4f53\u8d2d\u7968\uff0c\u53ea\u8981\u95e8\u7968\u8d39864\u5143\u3002\u4e24\u4e2a\u65c5\u6e38\u56e2\u5404\u6709\u51e0\u4eba\uff1f
\u3010\u89e3\u3011 \u56e0\u4e3a864\uff1e8\u00d7100\uff0c\u53ef\u77e5\u4e24\u56e2\u603b\u4eba\u6570\u8d85\u8fc7100\u4eba\uff0c\u56e0\u800c\u4e24\u56e2\u603b\u4eba\u6570\u4e3a864\u00f78=108\uff08\u4eba\uff09.
\u56e0\u4e3a108\u00d710=1080\uff1c1142\uff0c108\u00d712=1296\uff1e1142.\u6240\u4ee5\u6bcf\u4e2a\u56e2\u7684\u4eba\u6570\u4e0d\u4f1a\u90fd\u5927\u4e8e50\u4eba\uff0c\u4e5f\u4e0d\u4f1a\u90fd\u5c0f\u4e8e50\u4eba\uff0c\u5373\u4e00\u4e2a\u56e2\u5927\u4e8e50\u4eba\uff0c\u53e6\u4e00\u4e2a\u56e2\u5c11\u4e8e50\u4eba.
\u5047\u8bbe\u4e24\u56e2\u90fd\u5927\u4e8e 50\u4eba\uff0c\u5219\u5206\u522b\u4ed8\u6b3e\u65f6\uff0c\u5e94\u4ed8108\u00d710=1080\uff08\u5143\uff09\uff0c\u5b9e\u9645\u591a\u4ed8\u4e861142-1080=62\uff08\u5143\uff09.\u8fd9\u662f\u5c11\u4e8e50\u4eba\u7684\u65c5\u6e38\u56e2\u591a\u4ed8\u7684\u94b1.
\u56e0\u6b64\uff0c\u8fd9\u4e2a\u65c5\u6e38\u56e2\u7684\u4eba\u6570\u4e3a\uff1a62\u00f7\uff0812-10\uff09=31\uff08\u4eba\uff09\uff0c\u53e6\u4e00\u4e2a\u65c5\u6e38\u56e2\u4eba\u6570\u4e3a108-31=77\uff08\u4eba\uff09.
1\uff0c\u6709\u4e00\u53ea\u8239\u5728\u6c34\u4e2d\u822a\u884c\u4e0d\u5e78\u6f0f\u6c34\u3002\u5f53\u8239\u5458\u53d1\u73b0\u65f6\u8239\u91cc\u5df2\u7ecf\u8fdb\u4e86\u4e00\u4e9b\u6c34\uff0c\u4e14\u6c34\u4ecd\u5728\u5300\u901f\u8fdb\u5165\u8239\u5185\u3002\u82e58\u4eba\u6dd8\u6c34\uff0c\u8981\u75285\u5c0f\u65f6\u6dd8\u5b8c\uff1b\u82e510\u4eba\u6dd8\u6c34\uff0c\u8981\u75283\u5c0f\u65f6\u6dd8\u5b8c\u3002\u73b0\u5728\u8981\u6c422.5\u5c0f\u65f6\u6dd8\u5b8c\uff0c\u8981\u7528\u591a\u5c11\u4eba\u6dd8\u6c34\uff1f
\u7b54\u6848\uff1a11\u4e2a\u4eba
\u89e3:\u8bbe\u8239\u7684\u603b\u5bb9\u79ef\u4e3aa,\u8239\u8fdb\u6c34\u7684\u901f\u5ea6\u4e3ab,\u4eba\u6dd8\u6c34\u7684\u901f\u5ea6\u4e3ac,\u8bbe\u8981\u7528x\u4eba\u6dd8\u6c34\u80fd2.5\u5c0f\u65f6\u6dd8\u5b8c.
8*c*5=1/2*a+5*b (1)
10*c*3=1/2*a+3*b (2)
x*c*2.5=1/2*a+2.5*b (3)
(1)-(2)\u5f97\u5230b=5c (4)\uff0c\u628ab=5c\u4ee3\u5165(1)(2),\u7136\u540e(1)-(2)\u5f97\u52301/2a=15c (5)
\u628a(4)(5)\u4ee3\u5165(3),\u6700\u540e\u6574\u7406\u7684x=11
2.\u5feb\u3001\u6162\u4e24\u8f86\u8f66\u4ece\u5feb\u5230\u6162\u8f66\uff0c\u5feb\u8f66\u884c\u5230\u5168\u7a0b2/3\uff0c\u6162\u8f66\u8ddd\u7ec8\u70b9180\u5343\u7c73\uff0c\u4e24\u8f66\u6309\u539f\u901f\u7ee7\u7eed\u884c\u9a76\uff0c\u5feb\u5230\u5230\u8fbe\u7ec8\u70b9\uff0c\u6162\u8f66\u884c\u9a76\u4e86\u5168\u7a0b6/7\uff0c\u6c42\u5168\u7a0b\u591a\u5c11\u7c73\uff1f
\u7b54\u6848\uff1a\u5feb\u8f66\u884c\u5b8c\u5168\u7a0b\uff0c\u6162\u8f66\u8d70\u4e86\u5168\u7a0b\u76846/7\uff1b
\u540c\u6bd4\u53ef\u77e5\uff1a
\u5feb\u8f66\u884c\u5b8c\u5168\u7a0b\u76842/3\u65f6\uff0c\u6162\u8f66\u5e94\u8d70\u4e866/7*2/3(\u53734/7)\uff0c\u8fd8\u5269\u4f593/7\uff0c\u5168\u7a0b\u76843/7\u4e5f\u5c31\u662f\u5df2\u77e5\u6761\u4ef6180\uff0c\u5168\u7a0b\u5373\u4e3a180/\uff083/7\uff09=420\uff01
3,\u67d0\u94f6\u884c\u5efa\u7acb\u5927\u5b66\u751f\u52a9\u5b66\u8d37\u6b3e\uff0c6\u5e74\u671f\u7684\u8d37\u6b3e\u5e74\u5229\u7387\u4e3a\u767e\u5206\u4e4b\u516d\uff0c\u8d37\u6b3e\u5229\u606f\u7684\u767e\u5206\u4e4b\u4e94\u5341\u7531\u56fd\u5bb6\u8d22\u653f\u8d34\u8865\u3002\u67d0\u5927\u5b66\u751f\u9884\u8ba16\u5e74\u540e\u80fd\u4e00\u6b21\u6027\u507f\u8fd82\u4e07\u5143\uff0c\u5219\u4ed6\u73b0\u5728\u53ef\u4ee5\u8d37\u6b3e\u7684\u6570\u989d\u662f\u591a\u5c11\u5143\uff1f\uff08\u7cbe\u786e\u76841\u5143\uff09
\u7b54\u6848\uff1a\u8bbe\u4ed6\u73b0\u5728\u53ef\u4ee5\u8d37\u6b3e\u7684\u6570\u989d\u662fx\u5143\u3002
0.5(0.06x*6)+x=20000
0.18x+x=20000
1.18x=20000
x\u224816949
4\uff0c\u5c06\u25b3ABC\u7684\u8fb9\u5ef6\u957f\u81f3A1\uff0c\u4f7fB\u4e3a\u7ebf\u6bb5A A1\u7684\u4e2d\u70b9\uff0c\u540c\u6837\u65b9\u6cd5\uff0c\u5ef6\u957f\u8fb9BC\u5f97\u5230\u70b9B1\uff0c\u5ef6\u957f\u8fb9\u5f97\u5230\u70b9C1\uff0c\u5f97\u5230\u25b3A1 B1 C1\u79f0\u4e3a\u7b2c\u4e00\u6b21\u6269\u5c55\uff0c\u518d\u5c06\u25b3A1 B1 C1\u6309\u4e0a\u8ff0\u65b9\u6cd5\u5411\u5916\u6269\u5c55\u5f97\u5230\u25b3A2 B2 C2\uff0c\u5982\u6b64\uff0c\u8fdb\u884c\u4e0b\u53bb\uff0c\u5f97\u5230\u25b3An Bn Cn,\u7814\u7a76\u25b3An Bn Cn\u4e0e\u25b3ABC\u7684\u9762\u79ef\u5173\u7cfb\u3002\uff08\u5b57\u6570\u4e0d\u5c11\u4e8e200\uff09
\u7b54\u6848:\u8fde\u63a5A B1
\u2235AC=AC1
\u2234S\u25b3B1AC=S\u25b3B1AC1
\u53c8\u2235CB1=CB
\u2234S\u25b3B1AC=S\u25b3ABC
\u2234S\u25b3B1C1C=2S\u25b3ABC
\u540c\u7406\u53ef\u5f97S\u25b3AA1C1=S\u25b3BA1B1=2S\u25b3ABC
\u2234S\u25b3A1B1C1=7S\u25b3ABC
\u540c\u7406S\u25b3A2B2C2=7S\u25b3A1B1C1=49S\u25b3ABC
\u2234S\u25b3AnBnCn=7^nS\u25b3ABC
5\uff0c\u5c06\u25b3ABC\u7684\u8fb9\u5ef6\u957f\u81f3A1\uff0c\u4f7fB\u4e3a\u7ebf\u6bb5A A1\u7684\u4e2d\u70b9\uff0c\u540c\u6837\u65b9\u6cd5\uff0c\u5ef6\u957f\u8fb9BC\u5f97\u5230\u70b9B1\uff0c\u5ef6\u957f\u8fb9\u5f97\u5230\u70b9C1\uff0c\u5f97\u5230\u25b3A1 B1 C1\u79f0\u4e3a\u7b2c\u4e00\u6b21\u6269\u5c55\uff0c\u518d\u5c06\u25b3A1 B1 C1\u6309\u4e0a\u8ff0\u65b9\u6cd5\u5411\u5916\u6269\u5c55\u5f97\u5230\u25b3A2 B2 C2\uff0c\u5982\u6b64\uff0c\u8fdb\u884c\u4e0b\u53bb\uff0c\u5f97\u5230\u25b3An Bn Cn,\u7814\u7a76\u25b3An Bn Cn\u4e0e\u25b3ABC\u7684\u9762\u79ef\u5173.
\u7b54\u6848\uff1a\u8bbe\u4e09\u89d2\u5f62ABC\u4e09\u4e2a\u89d2\u5206\u522b\u4e3a\u03b1\u3001\u03b2\u3001\u03b3\u6309\u9898\u610f\u753b\u51fa\u4e09\u89d2\u5f62DEF\uff0c\u5219\u53ef\u5f97DEF\u7684\u4e09\u4e2a\u89d2\u5206\u522b\u4e3a180-\uff08180-\u03b1\uff09/2-(180-\u03b2)/2=(\u03b1+\u03b2)/2
180-\uff08180-\u03b3\uff09/2-(180-\u03b2)/2=(\u03b3+\u03b2)/2
180-\uff08180-\u03b1\uff09/2-(180-\u03b3)/2=(\u03b1+\u03b3)/2
\u5728\u4e09\u89d2\u5f62ABC\u5185\u4e00\u5b9a\u5b58\u5728\u03b1+\u03b2\uff1c180
\u03b3+\u03b2\uff1c180
\u03b1+\u03b3\uff1c180
\u6240\u4ee5\u5728\u4e09\u89d2\u5f62DEF\u4e2d\u4e09\u4e2a\u89d2\u90fd\u5c0f\u4e8e90\u6240\u4ee5DEF\u4e3a\u9510\u89d2\u4e09\u89d2\u5f62
\u5c0f\u7ea2\u6284\u5199\u4e00\u4efd\u6750\u6599\uff0c\u6bcf\u5206\u949f\u6284\u519930\u4e2a\u5b57\uff0c\u82e5\u5e72\u5206\u949f\u53ef\u4ee5\u6284\u5b8c\uff0c\u5f53\u5979\u6284\u5b8c\u8fd9\u4efd\u6750\u6599\u7684\u4e94\u5206\u4e4b\u4e8c\u65f6\uff0c\u51b3\u5b9a\u63d0\u9ad850%\u7684\u6548\u7387\uff0c\u7ed3\u679c\u63d0\u524d20\u5206\u949f\u6284\u5b8c\uff0c\u6c42\u8fd9\u4efd\u6750\u6599\u6709\u591a\u5c11\u5b57\uff1f
\u8bbe\u6750\u6599\u539f\u5148x\u5206\u949f\u53ef\u4ee5\u6284\u5b8c\uff0c\u5219\u6709
30x=30*(2/5x)+30*(1+50%)*(3/5x-20)
\u5f97\u51fax=100
\u8fd9\u4efd\u6750\u6599\u67093000\u5b57
3x-64=11
12+8x=52
0.8x-4.2=2.2
2x+5=10
3x-15=75
4x+4o=320
3x+77=122
5x-1.6=0.6
6x-4=20
10x-0.6=2.4
500-12x=140
1) 66x+17y=3967
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
3X+18=52 x=34/3
4Y+11=22 y=11/4
3X*9=5 x=5/27
8Z/6=48 z=36
3X+7=59 x=52/3
4Y-69=81 y=75/4
8X*6=5 x=5/48
7Z/9=4 y=63/7
15X+8-5X=54 x=4.6
5Y*5=27 y=27/40
8x+2=10 x=1
x*8=88 x=11
y-90=1 y=91
2x-98=2 x=50
6x*6=12 x=1/3
5-6=5x x=-1/5
6*x=42 x=7
55-y=33 y=22
11*3x=60 x=20/11
8-y=2 y=-6
1.x+2=3
2.x+32=33
3.x+6=18
4.4+x=47
5.19-x=8
6.98-x=13
7.66-x=10
8.5x=10
9.3x=27
10.7x=7
11.8x=8
12.9x=9
13.10x=100
14.66x=660
15.7x=49
16.2x=4
17.3x=9
18.4x=16
19.5x=25
20.6x=36
21.8x=64
22.9x=81
23.10x=100
24.11x=121
25.12x=144
26.13x=169
27.14x=196
28.15x=225
29.16x=256
30.17x=289
31.18x=324
32.19x=361
33.20x=400
31.21x=441
32.22x=484
33.111x=12321
34.1111x=1234321
35.11111x=123454321
36.111111x=12345654321
37.46/x=23
38.64/x=8
39.99/x=11
40.1235467564x=0
41.2x+1= -2+x
42.4x-3(20-x)=3
43.．-2(x-1)=4
44.3X+189=521
45.4Y+119=22 5
46.3X+77=59
47.4Y-6985=81
48.X=0.1
49.5X=55.5
50.Y=50-85
答案给你。。就这些了不好意思喔
我都还问别人也 难啦 我要抄2652单词 600计算题
绛旓細2x+17=35 3x-64=11 12+8x=52 0.8x-4.2=2.2 2x+5=10 3x-15=75 4x+4o=320 3x+77=122 5x-1.6=0.6 6x-4=20 10x-0.6=2.4 500-12x=140 1) 66x+17y=3967 25x+y=1200 绛旀锛歺=48 y=47 (2) 18x+23y=2303 74x-y=1998 绛旀锛歺=2...
绛旓細0.8x-4.2=2.2 2x+5=10 3x-15=75 4x+4o=320 3x+77=122 5x-1.6=0.6 6x-4=20 10x-0.6=2.4 500-12x=140 1) 66x+17y=3967 25x+y=1200 绛旀锛歺=48 y=47 (2) 18x+23y=2303 74x-y=1998 绛旀锛歺=27 y=79 (3) 44x+90y=7796 44x+y=3476 绛旀锛歺=79 y=48 (...
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绛旓細2x+17=35 3x-64=11 12+8x=52 0.8x-4.2=2.2 2x+5=10 3x-15=75 4x+4o=320 3x+77=122 5x-1.6=0.6 6x-4=20 10x-0.6=2.4 500-12x=140 1) 66x+17y=3967 25x+y=1200 绛旀:x=48 y=47 (2) 18x+23y=2303 74x-y=1998 绛旀:x=27 y=79 (3) 44x+90y=7796 44x+y=3476 绛旀:x=79...
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