x/2+y/3=13/2 ⑴x/3-y/4=3/2 ⑵解：⑴⑵同乘以12得6x+4y=784x-3y=18这下就好解了吧 y=6 x=9
3X+2Y=39,4X-3Y=18 变为9X+6Y=117,8X-6Y=36最后两式相加X=9,Y=6
