问题标题:
【(2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16】
问题描述:
(2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16
高永萍回答:
(2x-2y)/3-(x-y)=-1和6(x+y)-4(2x-y)=16
化简方程组得x-y=3,5y-x=8
将两式相加得4y=11,
y=11/4,x=23/4
罗庆生回答:
详细点!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
高永萍回答:
(2x-2y)/3-(x-y)=-1先提公因式得:2(x-y)/3-(x-y)=-1再通分得:2(x-y)-3(x-y)=-3化简:2x-2y-3x+3y=-3-x+y=-3得x-y=36(x+y)-4(2x-y)=16化简:6x+6y-8y+4y=1610x-2y=16得5x-y=8
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