{2x+y/3-2y=0 2(2x+y)-5=7y 快点 求解

joan5262022-10-04 11:39:542条回答

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edisonyxj 共回答了19个问题 | 采纳率94.7%
2x+y/3−2y=0①
2(2x+y)−5=7y②
由①得,2x+y=6y③,
③代入②得,2×6y-5=7y,
解得y=1,
把y=1代入③得,2x+1=6,
解得x=5/2
所以,方程组的解是
x=5/2
y=1
1年前
yyyttt 共回答了37个问题 | 采纳率
6x+y-6y=0
4x+2y-5=7y
6x=5y
4x-5=5y
4x-5=6x 得x=-5/2 y=-3为什么我和你们算的都不一样?如果你题目没写错,我肯定做得对你的错了你把答案代回原式算算。。。我代了 不对如果你把你自己的答案代回去算出来对,那你就相信自己的答案咯,何必问别人。。。...
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