是方程组么?
x/2+y/3=2-x 2x/3-y/6=y/3+17/6
3x+2y=12-6x 4x-y=2y+17
2y-3x=12 4x-3y=17
y=6+1.5x 4x-3(6+1.5x)=17
x=2
y=9
∴x=2,y=9