1.y=2x-3 2.5x+y=11解方程组
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
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
用代入法解方程组 {x-y=3 2y+3(x-y)=11}
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
解方程组X+Y/2=3X-2Y=10+6X+Y/4
用代入法解方程组:y=3(x-y),x=2(x-y)
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组:解方程组:|X+Y|=1|X|+2|Y|=3