Question

2(x-y)/3-(x+y)/4=-1 3(x+y)-2(x-y)=6

Answer 1

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