解方程组{3x+2y=11 3x-2y=7
解方程组x+y/3=x-y/4 2x+3y=11
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
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
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51
用代入法解方程组 {x-y=3 2y+3(x-y)=11}
解方程组:4x+5y=-3,2x-7y=-11
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
如果方程组3x+y=k x+3y=2的解x,y
解方程组:{x+|3x-y|+3y=15 2x+y=6