七年级上册数学一元一次方程难题 初一上数学难题，关于一元一次方程的应用题，最难的采纳，要答案
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1\u3001\u4e0b\u5217\u5404\u5f0f\u4e2d\u662f\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u662f\uff08 \uff09
A. 5a 4b B.4x 9x
C. 5x2 9y2 D. 7a-4b
2\u3001\u65b9\u7a0b3x-2=-5(x-2)\u7684\u89e3\u662f\uff08 \uff09
A.-1.5 B. 1.5C. 1 D. -1
3\u3001\u82e5\u5173\u4e8e \u7684\u65b9\u7a0b \u7684\u89e3\u6ee1\u8db3\u65b9\u7a0b \uff0c\u5219 \u7684\u503c\u4e3a\uff08 \uff09
A. 10 B. 8 C. D.
4\u3001\u4e0b\u5217\u6839\u636e\u7b49\u5f0f\u7684\u6027\u8d28\u6b63\u786e\u7684\u662f\uff08 \uff09
A. \u7531 \uff0c\u5f97 B. \u7531 \uff0c\u5f97
C. \u7531 \uff0c\u5f97 D. \u7531 \uff0c\u5f97
5\u3001\u89e3\u65b9\u7a0b \u65f6\uff0c\u53bb\u5206\u6bcd\u540e\uff0c\u6b63\u786e\u7ed3\u679c\u662f\uff08 \uff09
A. B.
C. C.
6 \u3001\u7535\u89c6\u673a\u552e\u4ef7\u8fde\u7eed\u4e24\u6b21\u964d\u4ef710\uff05\uff0c\u964d\u4ef7\u540e\u6bcf\u53f0\u7535\u89c6\u673a\u7684\u552e\u4ef7\u4e3aa \u5143\uff0c\u5219\u8be5\u7535\u89c6\u673a\u7684\u539f\u4ef7\u4e3a\uff08 \uff09
A. 0.81a \u5143 B. 1.21a\u5143 C. 1.1a\u5143 D.0.1a \u5143
8\u3001\u67d0\u5546\u5e97\u5356\u51fa\u4e24\u4ef6\u8863\u670d\uff0c\u6bcf\u4ef660\u5143\uff0c\u5176\u4e2d\u4e00\u4ef6\u8d5a25%\uff0c\u53e6\u4e00\u4ef6\u4e8f25%\uff0c\u90a3\u4e48\u8fd9\u4e24\u4ef6\u8863\u670d\u5356\u51fa\u540e\uff0c\u5546\u5e97\u662f ( )
A.\u4e0d\u8d5a\u4e0d\u4e8f B.\u8d5a8\u5143 C.\u4e8f8\u5143 D. \u8d5a8\u5143
9\u3001\u4e0b\u5217\u65b9\u7a0b\u4e2d\uff0c\u662f\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\u7684\u662f\uff08 \uff09
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10\u3001\u65b9\u7a0b \u7684\u89e3\u662f\uff08 \uff09
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12\u3001\u65b9\u7a0b \u7684\u89e3\u662f \uff0c\u5219 \u7b49\u4e8e\uff08 \uff09
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14\u3001\u4e0b\u5217\u65b9\u7a0b\u53d8\u5f62\u4e2d\uff0c\u6b63\u786e\u7684\u662f\uff08 \uff09
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16\u3001\u91cd\u5e86\u529b\u5e06\u65b0\u611f\u89c9\u8db3\u7403\u961f\u8bad\u7ec3\u7528\u7684\u8db3\u7403\u662f\u753132\u5757\u9ed1\u767d\u76f8\u95f4\u7684\u725b\u76ae\u7f1d\u5236\u800c\u6210\u7684\uff0c\u5176\u4e2d\u9ed1\u76ae\u53ef\u770b\u4f5c\u6b63\u4e94\u8fb9\u5f62\uff0c\u767d\u76ae\u53ef\u770b\u4f5c\u6b63\u516d\u8fb9\u5f62\uff0c\u9ed1\u3001\u767d\u76ae\u5757\u7684\u6570\u76ee\u6bd4\u4e3a3:5\uff0c\u8981\u6c42\u51fa\u9ed1\u76ae\u3001\u767d\u76ae\u7684\u5757\u6570\uff0c\u82e5\u8bbe\u9ed1\u76ae\u7684\u5757\u6570\u4e3a \uff0c\u5219\u5217\u51fa\u7684\u65b9\u7a0b\u6b63\u786e\u7684\u662f\uff08 \uff09
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2.25 2.43 2.70
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\u4e8c. \u586b\u7a7a\u9898\uff1a
1\u3001 \uff0c\u5219 ________.
2\u3001\u5df2\u77e5 \uff0c\u5219 __________.
3\u3001\u5173\u4e8e \u7684\u65b9\u7a0b \u7684\u89e3\u662f3\uff0c\u5219 \u7684\u503c\u4e3a________________.
4\u3001\u73b0\u6709\u4e00\u4e2a\u4e09\u4f4d\u6570\uff0c\u5176\u4e2a\u4f4d\u6570\u4e3a \uff0c\u5341\u4f4d\u4e0a\u7684\u6570\u5b57\u4e3a \uff0c\u767e\u4f4d\u6570\u4e0a\u7684\u6570\u5b57\u4e3a \uff0c\u5219\u8fd9\u4e2a\u4e09\u4f4d\u6570\u8868\u793a\u4e3a__________________.
5\u3001\u7532\u3001\u4e59\u4e24\u73ed\u5171\u6709\u5b66\u751f96\u540d\uff0c\u7532\u73ed\u6bd4\u4e59\u73ed\u591a2\u4eba\uff0c\u5219\u4e59\u73ed\u6709____________\u4eba.
6\u3001\u67d0\u6570\u76843\u500d\u6bd4\u5b83\u7684\u4e00\u534a\u59272\uff0c\u82e5\u8bbe\u67d0\u6570\u4e3a \uff0c\u5219\u5217\u65b9\u7a0b\u4e3a\uff3f\uff3f\uff3f\uff3f.
7\u3001\u5f53 \uff3f\uff3f\uff3f\u65f6\uff0c\u4ee3\u6570\u5f0f \u4e0e \u7684\u503c\u4e92\u4e3a\u76f8\u53cd\u6570.
8\u3001\u5728\u516c\u5f0f \u4e2d\uff0c\u5df2\u77e5 \uff0c\u5219 \uff3f\uff3f\uff3f.
\u65e5 \u4e00 \u4e8c \u4e09 \u56db \u4e94 \u516d
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31
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10\u3001\u4e00\u6839\u5185\u5f84\u4e3a3\u339d\u7684\u5706\u67f1\u5f62\u957f\u8bd5\u7ba1\u4e2d\u88c5\u6ee1\u4e86\u6c34\uff0c\u73b0\u628a\u8bd5\u7ba1\u4e2d\u7684\u6c34\u9010\u6e10\u6ef4\u5165\u4e00\u4e2a\u5185\u5f84\u4e3a8\u339d\u3001\u9ad8\u4e3a1.8\u339d\u7684\u5706\u67f1\u5f62\u73bb\u7483\u676f\u4e2d\uff0c\u5f53\u73bb\u7483\u676f\u88c5\u6ee1\u6c34\u65f6\uff0c\u8bd5\u7ba1\u4e2d\u7684\u6c34\u7684\u9ad8\u5ea6\u4e0b\u964d\u4e86\uff3f\uff3f\uff3f\uff3f\u339d.
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14\u3001\u4e00\u5e74\u5b9a\u671f\u5b58\u6b3e\u7684\u5e74\u5229\u7387\u4e3a1.98%\uff0c\u5230\u671f\u53d6\u6b3e\u65f6\u987b\u6263\u9664\u5229\u606f\u768420%\u4f5c\u4e3a\u5229\u606f\u7a0e\u4e0a\u7f34\u56fd\u5e93. \u5047\u82e5\u5c0f\u9896\u5b58\u4e00\u7b14\u4e00\u5e74\u5b9a\u671f\u50a8\u84c4\uff0c\u5230\u671f\u6263\u9664\u5229\u606f\u7a0e\u540e\u5b9e\u5f97\u5229\u606f158.4\u5143\uff0c\u90a3\u4e48\u5979\u5b58\u5165\u7684\u4eba\u6c11\u5e01\u662f\uff3f\uff3f\uff3f\uff3f\u5143
15\u300152\u8f86\u8f66\u6392\u6210\u4e24\u961f\uff0c\u6bcf\u8f86\u8f66\u957fa\u7c73\uff0c\u524d\u540e\u4e24\u8f66\u95f4\u96943a/2\u7c73\uff0c\u8f66\u961f\u5e73\u5747\u6bcf\u5206\u949f\u884c50\u7c73\uff0c\u8fd9\u5217\u8f66\u961f\u901a\u8fc7\u957f\u4e3a546\u7c73\u7684\u5e7f\u573a\u9700\u8981\u7684\u65f6\u95f4\u662f16\u5206\u949f\uff0c\u5219a\uff1d__________\uff0e
\u4e09\u3001\u89e3\u65b9\u7a0b:
1\u3001 2\u3001
3\u3001 4\u3001
5\u3001 6\u3001
7\u3001 8\u3001
9\u3001\u5df2\u77e5 \u662f\u65b9\u7a0b \u7684\u6839\uff0c\u6c42\u4ee3\u6570\u5f0f \u7684\u503c.
\u56db\u3001\u5217\u65b9\u7a0b\u89e3\u5e94\u7528\u9898\uff1a
1\u3001\u654c\u519b\u5728\u79bb\u6211\u519b8\u5343\u7c73\u7684\u9a7b\u5730\u9003\u8dd1\uff0c\u65f6\u95f4\u662f\u65e9\u66684\u70b9\uff0c\u6211\u519b\u4e8e5\u70b9\u51fa\u53d1\u4ee5\u6bcf\u5c0f\u65f610\u5343\u7c73\u7684\u901f\u5ea6\u8ffd\u51fb\uff0c\u7ed3\u679c\u57287\u70b9\u8ffd\u4e0a\uff0e\u6c42\u654c\u519b\u9003\u8dd1\u65f6\u7684\u901f\u5ea6\u662f\u591a\u5c11\uff1f
2\u3001\u671f\u4e2d\u8003\u67e5\uff0c\u4fe1\u606f\u6280\u672f\u8bfe\u8001\u5e08\u9650\u65f640\u5206\u949f\u8981\u6c42\u6bcf\u4f4d\u4e03\u5e74\u7ea7\u5b66\u751f\u6253\u5b8c\u4e00\u7bc7\u6587\u7ae0. \u5df2\u77e5\u72ec\u7acb\u6253\u5b8c\u540c\u6837\u5927\u5c0f\u6587\u7ae0\uff0c\u5c0f\u5b9d\u9700\u898150\u5206\u949f\uff0c\u5c0f\u8d1d\u53ea\u9700\u898130\u5206\u949f. \u4e3a\u4e86\u5b8c\u6210\u4efb\u52a1\uff0c\u5c0f\u5b9d\u6253\u4e8630\u5206\u949f\u540e\uff0c\u8bf7\u6c42\u5c0f\u8d1d\u5e2e\u52a9\u5408\u4f5c\uff0c\u4ed6\u80fd\u5728\u8981\u6c42\u7684\u65f6\u95f4\u6253\u5b8c\u5417\uff1f
3\u3001\u5728\u5b66\u5b8c\u201c\u6709\u7406\u6570\u7684\u8fd0\u7b97\u201d\u540e\uff0c\u5b9e\u9a8c\u4e2d\u5b66\u4e03\u5e74\u7ea7\u5404\u73ed\u5404\u9009\u51fa5\u540d\u5b66\u751f\u7ec4\u6210\u4e00\u4e2a\u4ee3\u8868\u961f\uff0c\u5728\u6570\u5b66\u65b9\u8001\u5e08\u7684\u7ec4\u7ec7\u4e0b\u8fdb\u884c\u4e00\u6b21\u77e5\u8bc6\u7ade\u8d5b. \u7ade\u8d5b\u89c4\u5219\u662f\uff1a\u6bcf\u961f\u90fd\u5206\u522b\u7ed9\u51fa50\u9053\u9898\uff0c\u7b54\u5bf9\u4e00\u9898\u5f973\u5206\uff0c\u2474 \u5982\u679c\u4e8c\u73ed\u4ee3\u8868\u961f\u6700\u540e\u5f97\u5206142\u5206\uff0c\u90a3\u4e48\u4e8c\u73ed\u4ee3\u8868\u961f\u56de\u7b54\u5bf9\u4e86\u591a\u5c11\u9053\u9898\uff1f\u2475 \u4e00\u73ed\u4ee3\u8868\u961f\u7684\u6700\u540e\u5f97\u5206\u80fd\u4e3a145\u5206\u5417\uff1f\u8bf7\u7b80\u8981\u8bf4\u660e\u7406\u7531.
4\u3001\u67d0\u201c\u5e0c\u671b\u5b66\u6821\u201d\u4fee\u5efa\u4e86\u4e00\u680b4\u5c42\u7684\u6559\u5b66\u5927\u697c\uff0c\u6bcf\u5c42\u697c\u67096\u95f4\u6559\u5ba4\uff0c\u8fdb\u51fa\u8fd9\u680b\u5927\u697c\u5171\u67093\u9053\u95e8\uff08\u4e24\u9053\u5927\u5c0f\u76f8\u540c\u7684\u6b63\u95e8\u548c\u4e00\u9053\u4fa7\u95e8\uff09. \u5b89\u5168\u68c0\u67e5\u4e2d\uff0c\u5bf9\u8fd93\u9053\u95e8\u8fdb\u884c\u4e86\u6d4b\u8bd5\uff1a\u5f53\u540c\u65f6\u5f00\u542f\u4e00\u9053\u6b63\u95e8\u548c\u4e00\u9053\u4fa7\u95e8\u65f6\uff0c2\u5206\u949f\u5185\u53ef\u4ee5\u901a\u8fc7400\u540d\u5b66\u751f\uff0c\u82e5\u4e00\u9053\u6b63\u95e8\u5e73\u5747\u6bcf\u5206\u949f\u6bd4\u4e00\u9053\u4fa7\u95e8\u53ef\u591a\u901a\u8fc740\u540d\u5b66\u751f.
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5\u3001\u9ed1\u718a\u5988\u5988\u60f3\u68c0\u6d4b\u5c0f\u718a\u5b66\u4e60\u201c\u5217\u65b9\u7a0b\u89e3\u5e94\u7528\u9898\u201d\u7684\u6548\u679c\uff0c\u7ed9\u4e86\u5c0f\u718a19\u4e2a\u82f9\u679c\uff0c\u8981\u5c0f\u718a\u628a\u5b83\u4eec\u5206\u62104\u5806. \u8981\u6c42\u5206\u540e\uff0c\u5982\u679c\u518d\u628a\u7b2c\u4e00\u5806\u589e\u52a0\u4e00\u500d\uff0c\u7b2c\u4e8c\u5806\u589e\u52a0\u4e00\u4e2a\uff0c\u7b2c\u4e09\u5806\u51cf\u5c11\u4e24\u4e2a\uff0c\u7b2c\u56db\u5806\u51cf\u5c11\u4e00\u500d\u540e\uff0c\u8fd94\u5806\u82f9\u679c\u7684\u4e2a\u6570\u53c8\u8981\u76f8\u540c. \u5c0f\u718a\u634e\u634e\u8111\u888b\uff0c\u8be5\u5982\u4f55\u5206\u8fd919\u4e2a\u82f9\u679c\u4e3a4\u5806\u5462\uff1f
6\u3001\u5b66\u6821\u51c6\u5907\u62ff\u51fa2000\u5143\u8d44\u91d1\u7ed922\u540d\u201c\u5e0c\u671b\u676f\u201d\u7ade\u8d5b\u83b7\u5956\u5b66\u751f\u4e70\u5956\u54c1\uff0c\u4e00\u7b49\u5956\u6bcf\u4eba200\u5143\u5956\u54c1\uff0c\u4e8c\u7b49\u5956\u6bcf\u4eba50\u5143\u5956\u54c1\uff0c\u6c42\u5f97\u5230\u4e00\u7b49\u5956\u548c\u4e8c\u7b49\u5956\u7684\u5b66\u751f\u5206\u522b\u662f\u591a\u5c11\u4eba\uff1f
7\u3001\u4e00\u5bb6\u5546\u5e97\u5c06\u67d0\u79cd\u5546\u54c1\u6309\u6210\u672c\u4ef7\u63d0\u9ad840%\u540e\u6807\u4ef7\uff0c\u5143\u65e6\u671f\u95f4\uff0c\u6b32\u6253\u516b\u6298\u9500\u552e\uff0c\u4ee5\u7b54\u8c22\u65b0\u8001\u987e\u5ba2\u5bf9\u672c\u5546\u53a6\u7684\u5149\u987e\uff0c\u552e\u4ef7\u4e3a224\u5143\uff0c\u8fd9\u4ef6\u5546\u54c1\u7684\u6210\u672c\u4ef7\u662f\u591a\u5c11\u5143\uff1f
8\u3001\u7532\u4e59\u4e24\u4eba\u4ece\u5b66\u6821\u52301000\u7c73\u8fdc\u7684\u5c55\u89c8\u9986\u53bb\u53c2\u89c2\uff0c\u7532\u8d70\u4e865\u5206\u949f\u540e\u4e59\u624d\u51fa\u53d1\uff0c\u7532\u7684\u901f\u5ea6\u662f80\u7c73/\u5206\uff0c\u4e59\u7684\u901f\u5ea6\u662f180\u7c73/\u5206\uff0c\u95ee\u4e59\u591a\u957f\u65f6\u95f4\u80fd\u8ffd\u4e0a\u7532\uff1f\u8ffd\u4e0a\u7532\u65f6\u79bb\u5c55\u89c8\u9986\u8fd8\u6709\u591a\u8fdc\uff1f
\u8f83\u9ad8\u8981\u6c42\uff1a
1\u3001\u5df2\u77e5 \uff0c\u90a3\u4e48\u4ee3\u6570\u5f0f \u7684\u503c\u3002
2\u3001\uff082001\u5e74\u6c5f\u82cf\u7701\u65e0\u9521\u5e02\u4e2d\u8003\u9898\uff09\u67d0\u5546\u573a\u6839\u636e\u5e02\u573a\u4fe1\u606f\uff0c\u5bf9\u5546\u573a\u4e2d\u73b0\u6709\u7684\u4e24\u53f0\u4e0d\u540c\u578b\u53f7\u7684\u7a7a\u8c03\u8fdb\u884c\u8c03\u4ef7\u9500\u552e\uff0c\u5176\u4e2d\u4e00\u53f0\u7a7a\u8c03\u8c03\u4ef7\u540e\u552e\u51fa\u53ef\u83b7\u522910\uff05\uff08\u76f8\u5bf9\u4e8e\u8fdb\u4ef7\uff09\uff0c\u53e6\u4e00\u53f0\u7a7a\u8c03\u8c03\u4ef7\u540e\u552e\u51fa\u5219\u4e8f\u672c10\uff05\uff08\u76f8\u5bf9\u4e8e\u8fdb\u4ef7\uff09\uff0c\u800c\u8fd9\u4e24\u53f0\u7a7a\u8c03\u8c03\u4ef7\u540e\u7684\u552e\u4ef7\u6070\u597d\u76f8\u540c\uff0c\u90a3\u4e48\u5546\u573a\u628a\u8fd9\u4e24\u53f0\u7a7a\u8c03\u8c03\u4ef7\u540e\u552e\u51fa\uff08 \uff09\uff0e
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3\u3001\u67d0\u5f00\u53d1\u5546\u6309\u7167\u5206\u671f\u4ed8\u6b3e\u7684\u5f62\u5f0f\u552e\u623f\uff0c\u5c0f\u660e\u5bb6\u8d2d\u4e70\u4e86\u4e00\u5957\u73b0\u4ef7\u4e3a12\u4e07\u5143\u7684\u65b0\u623f\uff0c\u8d2d\u623f\u65f6\u9700\u9996\u4ed8\uff08\u7b2c\u4e00\u5e74\uff09\u6b3e3\u4e07\u5143\uff0c\u4ece\u7b2c\u4e8c\u5e74\u8d77\uff0c\u4ee5\u540e\u6bcf\u5e74\u5e94\u4ed8\u623f\u6b3e\u4e3a5000\u5143\u4e0e\u4e0a\u4e00\u5e74\u5269\u4f59\u6b20\u6b3e\u7684\u5229\u606f\u4e4b\u548c\u3002\u5df2\u77e5\u5269\u4f59\u6b3e\u7684\u5e74\u5229\u7387\u4e3a0.4%\uff0c\u95ee\u7b2c\u51e0\u5e74\u5c0f\u660e\u5bb6\u9700\u4ea4\u623f\u6b3e5200\u5143\uff1f
4\u3001\u67d0\u725b\u5976\u52a0\u5de5\u5382\u73b0\u6709\u9c9c\u59769\u5428\uff0c\u82e5\u5728\u5e02\u573a\u4e0a\u76f4\u63a5\u9500\u552e\u9c9c\u5976\uff0c\u6bcf\u5428\u53ef\u83b7\u5229\u6da6500\u5143\uff0c\u82e5\u5236\u6210\u9178\u5976\u9500\u552e\uff0c\u6bcf\u5428\u53ef\u83b7\u5229\u6da61200\u5143\uff1b\u82e5\u5236\u6210\u5976\u7247\u9500\u552e\uff0c\u6bcf\u5428\u53ef\u83b7\u5229\u6da62000\u5143.
\u65b9\u6848\u4e00\uff1a\u5c3d\u53ef\u80fd\u591a\u7684\u5236\u6210\u5976\u7247\uff0c\u5176\u4f59\u76f4\u63a5\u9500\u552e\u9c9c\u725b\u5976\uff1b
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5\u3001\u4e24\u8f86\u6c7d\u8f66\u4ece\u540c\u4e00\u5730\u70b9\u540c\u65f6\u51fa\u53d1\uff0c\u6cbf\u7740\u540c\u4e00\u65b9\u5411\u540c\u901f\u76f4\u7ebf\u884c\u9a76\uff0c\u6bcf\u8f66\u6700\u591a\u53ea\u80fd\u5e2624\u6876\u6c7d\u6cb9\uff0c\u9014\u4e2d\u4e0d\u80fd\u7528\u522b\u7684\u6cb9\uff0c\u6bcf\u6876\u6cb9\u53ef\u4f7f\u4e00\u8f86\u8f66\u524d\u8fdb60\u516c\u91cc\uff0c\u4e24\u8f66\u90fd\u5fc5\u987b\u8fd4\u56de\u51fa\u53d1\u5730\u70b9\uff0c\u4f46\u662f\u53ef\u4ee5\u4e0d\u540c\u65f6\u8fd4\u56de\uff0c\u4e24\u8f66\u76f8\u4e92\u53ef\u501f\u7528\u5bf9\u65b9\u7684\u6cb9\u3002\u4e3a\u4e86\u4f7f\u5176\u4e2d\u4e00\u8f66\u5c3d\u53ef\u80fd\u5730\u8fdc\u79bb\u51fa\u53d1\u5730\u70b9\uff0c\u53e6\u4e00\u8f86\u8f66\u5e94\u5f53\u5728\u79bb\u51fa\u53d1\u5730\u70b9\u591a\u5c11\u516c\u91cc\u5730\u65b9\u8fd4\u56de\uff1f\u79bb\u51fa\u53d1\u5730\u70b9\u6700\u8fdc\u7684\u90a3\u8f86\u8f66\u4e00\u5171\u884c\u9a76\u4e86\u591a\u5c11\u516c\u91cc\uff1f
\uff08\u4ee5\u4e0a\u5e94\u7528\u9898\uff0c\u5747\u65e0\u7b54\u6848\u00b7\uff09
\u4e00\u3001\u5224\u65ad\u9898\uff1a
\uff081\uff09\u5224\u65ad\u4e0b\u5217\u65b9\u7a0b\u662f\u5426\u662f\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff1a
\u2460-3x-6x=7;( ) \u2461( )
\u24625x 1-2x=3x-2; ( ) \u24633y-4=2y 1. ( )
\uff082\uff09\u5224\u65ad\u4e0b\u5217\u65b9\u7a0b\u7684\u89e3\u6cd5\u662f\u5426\u6b63\u786e\uff1a
\u2460\u89e3\u65b9\u7a0b3y-4=y 3
\u89e3\uff1a3y-y=3 4,2y=7,y=;( )
\u2461\u89e3\u65b9\u7a0b\uff1a0.4x-3=0.1x 2
\u89e3\uff1a0.4x 0.1x=2-3;0.5x=-1,x=-2;( )
\u2462\u89e3\u65b9\u7a0b
\u89e3\uff1a5x 15-2x-2=10,3x=-3,x=-1;
\u2463\u89e3\u65b9\u7a0b
\u89e3\uff1a2x-4 5-5x=-1,-3x=-2,x=.( )
\u4e8c\u3001\u586b\u7a7a\u9898\uff1a
\uff081\uff09\u82e52\uff083-a\uff09x-4=5\u662f\u5173\u4e8ex\u7684\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u5219a\u2260 .
\uff082\uff09\u5173\u4e8ex\u7684\u65b9\u7a0bax=3\u7684\u89e3\u662f\u81ea\u7136\u6570\uff0c\u5219\u6574\u6570a\u7684\u503c\u4e3a\uff1a .
\uff083\uff09\u65b9\u7a0b5x-2(x-1)=17 \u7684\u89e3\u662f .
\uff084\uff09x=2\u662f\u65b9\u7a0b2x-3=m-\u7684\u89e3\uff0c\u5219m= .
\uff085\uff09\u82e5-2x 1=0 \u662f\u5173\u4e8ex\u7684\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u5219m= .
\uff086\uff09\u5f53y= \u65f6\uff0c\u4ee3\u6570\u5f0f5y 6\u4e0e3y-2\u4e92\u4e3a\u76f8\u53cd\u6570.
\uff087\uff09\u5f53m= \u65f6\uff0c\u65b9\u7a0b\u7684\u89e3\u4e3a0.
\uff088\uff09\u5df2\u77e5a\u22600.\u5219\u5173\u4e8ex\u7684\u65b9\u7a0b3ab-(a b)x=(a-b)x\u7684\u89e3\u4e3a .
\u4e09\uff0e\u9009\u62e9\u9898\uff1a
\uff081\uff09\u65b9\u7a0bax=b\u7684\u89e3\u662f\uff08 \uff09.
A\uff0e\u6709\u4e00\u4e2a\u89e3x= B\uff0e\u6709\u65e0\u6570\u4e2a\u89e3
C\uff0e\u6ca1\u6709\u89e3 D\uff0e\u5f53a\u22600\u65f6\uff0cx=
\uff082\uff09\u89e3\u65b9\u7a0b(x-1)=3,\u4e0b\u5217\u53d8\u5f62\u4e2d\uff0c\u8f83\u7b80\u6377\u7684\u662f\uff08 \uff09
A.\u65b9\u7a0b\u4e24\u8fb9\u90fd\u4e58\u4ee54\uff0c\u5f973\uff08x-1\uff09=12
B.\u53bb\u62ec\u53f7\uff0c\u5f97x-=3
C.\u4e24\u8fb9\u540c\u9664\u4ee5\uff0c\u5f97x-1=4
D.\u6574\u7406\uff0c\u5f97
\uff083\uff09\u65b9\u7a0b2-\u53bb\u5206\u6bcd\u5f97\uff08 \uff09
A.2-2(2x-4)=-(x-7) B.12-2(2x-4)=-x-7
C.12-2(2x-4)=-(x-7) D.\u4ee5\u4e0a\u7b54\u6848\u5747\u4e0d\u5bf9
\uff084\uff09\u82e5\u4ee3\u6570\u5f0f\u6bd4\u59271\uff0c\u5219x\u7684\u503c\u662f\uff08 \uff09.
A\uff0e13 B\uff0e C\uff0e8 D\uff0e
\uff085\uff09x=1\u662f\u65b9\u7a0b\uff08 \uff09\u7684\u89e3.
A\uff0e-
B\uff0e
C\uff0e2{3[4(5x-1)-8]-2}=8
D\uff0e4x =6x
\u56db\u3001\u89e3\u4e0b\u5217\u65b9\u7a0b\uff1a
\uff081\uff097(2x-1)-3(4x-1)=4(3x 2)-1;
\uff082\uff09(5y 1) (1-y)= (9y 1) (1-3y);
\uff083\uff09[()-4]=x 2;
\uff084\uff09
\uff085\uff09
\uff086\uff09
\u4e00\u3001\u5224\u65ad\u9898\uff1a
\uff081\uff09\u5224\u65ad\u4e0b\u5217\u65b9\u7a0b\u662f\u5426\u662f\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff1a
\u2460-3x-6x2=7;( ) \u2461 ( )
\u24625x 1-2x=3x-2; ( ) \u24633y-4=2y 1. ( )
\uff082\uff09\u5224\u65ad\u4e0b\u5217\u65b9\u7a0b\u7684\u89e3\u6cd5\u662f\u5426\u6b63\u786e\uff1a
\u2460\u89e3\u65b9\u7a0b3y-4=y 3
\u89e3\uff1a3y-y=3 4,2y=7,y= ;( )
\u2461\u89e3\u65b9\u7a0b\uff1a0.4x-3=0.1x 2
\u89e3\uff1a0.4x 0.1x=2-3;0.5x=-1,x=-2;( )
\u2462\u89e3\u65b9\u7a0b
\u89e3\uff1a5x 15-2x-2=10,3x=-3,x=-1;
\u2463\u89e3\u65b9\u7a0b
\u89e3\uff1a2x-4 5-5x=-1,-3x=-2,x= .( )
\u4e8c\u3001\u586b\u7a7a\u9898\uff1a
\uff081\uff09\u82e52\uff083-a\uff09x-4=5\u662f\u5173\u4e8ex\u7684\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u5219a\u2260 .
\uff082\uff09\u5173\u4e8ex\u7684\u65b9\u7a0bax=3\u7684\u89e3\u662f\u81ea\u7136\u6570\uff0c\u5219\u6574\u6570a\u7684\u503c\u4e3a\uff1a .
\uff083\uff09\u65b9\u7a0b5x-2(x-1)=17 \u7684\u89e3\u662f .
\uff084\uff09x=2\u662f\u65b9\u7a0b2x-3=m- \u7684\u89e3\uff0c\u5219m= .
\uff085\uff09\u82e5-2x2-5m 1=0 \u662f\u5173\u4e8ex\u7684\u4e00\u5143\u4e00\u6b21\u65b9\u7a0b\uff0c\u5219m= .
\uff086\uff09\u5f53y= \u65f6\uff0c\u4ee3\u6570\u5f0f5y 6\u4e0e3y-2\u4e92\u4e3a\u76f8\u53cd\u6570.
\uff087\uff09\u5f53m= \u65f6\uff0c\u65b9\u7a0b \u7684\u89e3\u4e3a0.
\uff088\uff09\u5df2\u77e5a\u22600.\u5219\u5173\u4e8ex\u7684\u65b9\u7a0b3ab-(a b)x=(a-b)x\u7684\u89e3\u4e3a .
\u4e09\uff0e\u9009\u62e9\u9898\uff1a
\uff081\uff09\u65b9\u7a0bax=b\u7684\u89e3\u662f\uff08 \uff09.
A\uff0e\u6709\u4e00\u4e2a\u89e3x= B\uff0e\u6709\u65e0\u6570\u4e2a\u89e3
C\uff0e\u6ca1\u6709\u89e3 D\uff0e\u5f53a\u22600\u65f6\uff0cx=
\uff082\uff09\u89e3\u65b9\u7a0b ( x-1)=3,\u4e0b\u5217\u53d8\u5f62\u4e2d\uff0c\u8f83\u7b80\u6377\u7684\u662f\uff08 \uff09
A.\u65b9\u7a0b\u4e24\u8fb9\u90fd\u4e58\u4ee54\uff0c\u5f973\uff08 x-1\uff09=12
B.\u53bb\u62ec\u53f7\uff0c\u5f97x- =3
C.\u4e24\u8fb9\u540c\u9664\u4ee5 \uff0c\u5f97 x-1=4
D.\u6574\u7406\uff0c\u5f97
\uff083\uff09\u65b9\u7a0b2- \u53bb\u5206\u6bcd\u5f97\uff08 \uff09
A.2-2(2x-4)=-(x-7) B.12-2(2x-4)=-x-7
C.12-2(2x-4)=-(x-7) D.\u4ee5\u4e0a\u7b54\u6848\u5747\u4e0d\u5bf9
\uff084\uff09\u82e5\u4ee3\u6570\u5f0f \u6bd4 \u59271\uff0c\u5219x\u7684\u503c\u662f\uff08 \uff09.
A\uff0e13 B\uff0e C\uff0e8 D\uff0e
\uff085\uff09x=1\u662f\u65b9\u7a0b\uff08 \uff09\u7684\u89e3.
A\uff0e-
B\uff0e
C\uff0e2{3[4(5x-1)-8]-2}=8
D\uff0e4x =6x
\u56db\u3001\u89e3\u4e0b\u5217\u65b9\u7a0b\uff1a
\uff081\uff097(2x-1)-3(4x-1)=4(3x 2)-1;
\uff082\uff09 (5y 1) (1-y)= (9y 1) (1-3y);
\uff083\uff09 [ ( )-4 ]=x 2;
20% (1-20%)(320-x)=320\u00d740%
2(x-2) 2=x 1
2(x-2)-3(4x-1)=9(1-x)
11x 64-2x=100-9x
15-(8-5x)=7x (4-3x)
3(x-7)-2[9-4(2-x)]=22
3/2[2/3(1/4x-1)-2]-x=2
\u4e94\u3001\u89e3\u7b54\u4e0b\u5217\u5404\u9898\uff1a
\uff081\uff09x\u7b49\u4e8e\u4ec0\u4e48\u6570\u65f6\uff0c\u4ee3\u6570\u5f0f \u7684\u503c\u76f8\u7b49\uff1f
\uff082\uff09y\u7b49\u4e8e\u4ec0\u4e48\u6570\u65f6\uff0c\u4ee3\u6570\u5f0f \u7684\u503c\u6bd4\u4ee3\u6570\u5f0f \u7684\u503c\u5c113\uff1f
\uff083\uff09\u5f53m\u7b49\u4e8e\u4ec0\u4e48\u6570\u65f6\uff0c\u4ee3\u6570\u5f0f2m- \u7684\u503c\u4e0e\u4ee3\u6570\u5f0f \u7684\u503c\u7684\u548c\u7b49\u4e8e5\uff1f
\uff084\uff09\u89e3\u4e0b\u5217\u5173\u4e8ex\u7684\u65b9\u7a0b\uff1a
3x 6=9x 3\uff1b
(85 x)8=8\uff1b
78x 8(5 x)=34
\u8bf4\u771f\u7684\u4e00\u5143\u4e00\u6b21\u6ca1\u6709\u96be\u9898\u3002\u3002\u3002
解:设一名一级师傅一天粉刷x平方米，则一名二师傅一天粉刷(x-10)平方米(3x+50)/8=[5(x-10)-40]/10
解得x=122
(3*122+50)/8=52(平方米）
答：这些教室需要粉刷的墙壁面积各是52平方米。
解:设一名一级师傅一天粉刷x平方米，则一名二师傅一天粉刷(x-10)平方米
(3x+50)/8=[5(x-10)-40]/10
解,得x=122
(3*122+50)/8=52(平方米）
答：这些教室需要粉刷的墙壁面积各是52平方米。
回答正确吗？
设一级师傅一天刷的为X
3X+50=5X-40
X=45
总的面积为3X+50=185
52平方米
绛旓細1.璁惧鐢熶汉鏁颁负x銆傚垯鍒鏂圭▼涓猴細240+120x=240脳锛1+x锛壝0.6 瑙=4 2.璁剧涓娈典负x锛岀浜屾涓簓 鍋囪绗簩娈电殑闀挎瘮绗竴娈电殑2鍊嶅皯5cm 鍒欐湁y=2x-5 鏈夊洜涓烘闀夸负100cm 鎵浠+y=x+2x-5=100 瑙ｅ緱x=35 搴旇鍦ㄨ窛鏈ㄦ涓娈35cm澶勯敮銆3.瑙ｏ細鏍规嵁绗竴涓潯浠跺彲寰楋紝鐏溅鐨勯熷害涓簐=300梅20...
绛旓細涓鍏冧竴娆℃柟绋 鏈夌瓟妗 1銆亁/4=-x/2+3 x/4+x/2=3 3x/4=3 x=4 2銆1/2锛坸*x-y锛+1/3锛坸-y*y锛+1/6锛坸*x+y*y锛=1/2x^2-1/2y+1/3x-1/3y^2+1/6x^2+1/6y^2 =2/3x^2-1/2y+1/3x-1/6y^2 3銆亁/4=-x/2+3 4銆亁/4+x/2=34 3x/4=34 x=34 4銆侊紙x+...
绛旓細1 璁剧敳闄嶄环鐧惧垎鏁颁负x锛屽垯涔欐彁浠风櫨鍒嗘暟涓2x 锛1+1.5锛*锛1+2%锛=(1+2x)+1.5*(1-x)2.5*1.02=1+2x+1.5-1.5x 2.55=2.5+0.5x 0.5x=0.05 x=0.1 x=10 2x=20 绛旓細璁剧敳闄嶄环鐧惧垎鏁颁负10%锛屽垯涔欐彁浠风櫨鍒嗘暟涓20 2璁惧姞宸ョ敳绉嶉浂浠跺伐浜篨浜,涔欓浂浠禮浜,涓欓浂浠59-X-Y浜 15X/3=...
绛旓細瑙ｏ細璁剧涓涓暟涓簒,鍒欑浜屼釜鏁颁负100-x x+3=锛100-x锛-3 x+3=100-x-3 x+x=100-3-3 2x=94 x=47 绗簩涓暟 100-x=100-47=53 绛旓細绗竴涓暟涓47锛岀浜屼釜鏁颁负53.
绛旓細1銆佽楠戣溅鐨勬椂闂翠负X锛岃蛋璺椂闂翠负X+0.5 30*X=18*锛圶+0.5锛塜=0.75灏忔椂锛45鍒嗛挓锛夎矾绋婼=30*0.75=22.5Km 璁″垝鐢ㄦ椂锛45+5=50鍒嗛挓锛夛細50/60锛岄熷害涓22.5/50/60=27鍗冪背/鏃 2銆佽姘存祦閫熷害涓篨 锛26+X锛*3=锛26-X锛*3.5 X=2锛屾按娴侀熷害涓2km/鏃 ...
绛旓細鍒濅竴涓鍏冧竴娆℃柟绋鍗曠嫭鑰冪殑棰樼洰闅句笉鍒板摢閲屽幓,椤跺澶嶆潅涓鐐,涓昏鏄嚑绫诲簲鐢ㄩ瑕佹帉鎻.缁欎綘鍑犻亾涓嶇畻闅剧殑棰樺惂,浠ヤ笅閮芥憳鑷垜鍒濅竴閿欓鏈,娌＄鍒拌繃鎵璋撴渶闅剧殑棰 <姒傚康棰>鏂圭▼k路(x^4-k) =x+4(k鏄笉涓4鐨勫父鏁)鏄叧浜巟鐨涓鍏冧竴娆℃柟绋.(1)璇曠‘瀹歬鐨勫;(2)瑙ｆ涓鍏冧竴娆℃柟绋.[鐐硅瘎:姝ら娑夊強鍒嗙被...
绛旓細A=2X²+3aX-2X-1;B=-X²+aX-1锛3A+6B=6X²+9aX-6X-3-6X²+6aX-6锛=15aX-6X-9 鑻ョ粨鏋滀笉鍚玐椤癸紝鍒欓渶瑕15a-6=0;鍗砤=2/5=0.4
绛旓細3/20x=1-1/3 3/20x=2/3 x=2/3*20/3 x=40/9 (6)瑙ｏ細璁鹃潤姘撮熷害涓簒.10(x-3)=6(x+3)10x-30=6x+18 10x-6x=18+30 4x=48 x=12 (5)瑙ｏ細璁捐繖鏍疯蛋浜唜鍒嗛挓锛屽氨鍙互灏嗚借鐨勬椂闂磋ˉ涓.(50-40)x=40*6 10x=240 x=24 24*50=1200(km)(3)瑙ｏ細璁鹃氳鍛樿x灏忔椂鎵嶈兘杩戒笂闃熶紞....
绛旓細25x+45*(1200-x)=46000 54000-20x=46000 x=400 鎵浠ョ敳鍨嬭妭鑳界伅杩涜揣400鍙帮紝涔欏瀷鑺傝兘鐏繘璐800鍙 绗簩灏忛 鐢插瀷鑺傝兘鐏繘璐鍙紝涔欏瀷鑺傝兘鐏繘璐1200-x鍙 (30-25)x+(60-45)*(1200-x)=25x+45*(1200-x)*30 5x+18000-15x=16200-6x 4x=1800 x=450 鎵浠ョ敳鍨嬭妭鑳界伅杩涜揣450鍙帮紝涔欏瀷鑺傝兘鐏繘璐...
绛旓細涓銆佷负浠涔20鍙-20锛屼綘杩欐牱鐞嗚В锛氬師寮忥細3x+20=4x-25 ,涓よ竟鍑20 3X+20-20=4X-25-20 3X+0=4X-25-20,绉婚」灏辨槸杩欎釜鎰忔 浜屻4X鍙樹负-4X涔熸槸涓鏍风殑鎰忔 鍘熷紡锛3x+20=4x-25 3X+20-4X=4X-25-4X
