｛x+y/2+x-y/3=6 4（x+y）-3（x-y）=0 用加减消元法解方程组

(x+y)/2+(x-y)/3=6……①4(x+y)-3(x-y)=0 …… ②由①：3(x+y)+2(x-y)=363x+3y+2x-2y=365x+y=36……③由②：4x+4y-3x+3y=0x+7y=0…… ④④×5-③：5x+35y-(5x+y)=0-3634y=-36y=-18/17将y=-18/17带入④x=0-7y=0-[7×(...