解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3(x-y)=15

问题描述:

解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3(x-y)=15

是x=5 y=3过程呢有点麻烦求啦