{3分之2x-4分之3y=2分之1
8x-9y=6 (1)
{4(x-y)-3(2x+y)=17
-2x-7y=17
-8x-28y=68 (2)
(1)+(2)
-37y=74
y=-2
y=-2代入(1)
8x+18=6
x=-3/2
方程组的解为x=-3/2 ,y=-2