{2(x-y)=2y-x+1 ①50%x+10%y=8%*50 ②

问题描述:

{2(x-y)=2y-x+1 ①50%x+10%y=8%*50 ②

①化简得,3x-4y=1
②化简得,5x+y=40
②乘以4 得20x+4y=160 ③
③+ ②得 23x=161 解得x=7代入②
35+y=40得y=5.
所以 x=7 y=5
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