解方程组：13x+11y=1170 9(x+y)=1078 过

解方程组: ｛3x+2y=13 3x-2y=5 ｛x-y/3=x+y/2+1 2x-5y=9 解方程组x+y/3=x-y/4 2x+3y=11 解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快 解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27 解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66 解方程组：2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66 解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10 解方程组{4/x+y+6/x-y=3, 9/x-y-1/x+y=1 解方程组：{4/x+y+6/x-y=3 9/x-y-1/x+y=1} 解方程组:｛11x+9y=26 9x+11y=14 解方程组x+y=13,y+z=9,x+z=2