2(x-y)/3-(x+y)/4=-1 3(x+y)-2(x-y)=6
问题描述：
2(x-y)/3-(x+y)/4=-1 3(x+y)-2(x-y)=6
过程
答
2(x-y)/3-(x+y)/4=-1
即：8（x-y)-3(x+y)=-12①
3(x+y)-2(x-y)=6②
①+②×4
9(x+y)=12
x+y=4/3③
①+②
6(x-y)=-6
x-y=-1④
③+④
2x=4/3-1
2x=1/3
x=1/6
∴y=-1-1/6=-7/6
即：方程组的解为x=1/6；y=-7/6