解方程组:x-y=3.2y+3(x-y)=11
解方程组:x-y=3.2y+3(x-y)=11
解方程组x+y/3=x-y/4 2x+3y=11
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
用代入法解方程组 {x-y=3 2y+3(x-y)=11}
解方程组(三分之x+y)+y=6,3(x+y)-y=24
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
用代入法解方程组:y=3(x-y),x=2(x-y)
解方程组 x=3y-6 0.8(x+y)=x+y-13.6