｜2x-3｜+｜3y+2｜=0 因为｜2x-3｜≥0｜3y+2｜≥0所以｜2x-3｜=0 ｜3y+2｜=0 所以2x-3=0 x=3/23y+2=0 y=-2/3x-y=3/2-(-2/3)=3/2+2/3=13/6