解方程组y=x+2,3x+2y=9和3x-4y=8,2x+2y=3
解方程组x:y=2:3和5x+3y=38 3y+x/y=8和9y-2x/y=9
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
方程组x-2y=8,3x-4y=5,x=?,y=?
解方程组X+Y/2=3X-2Y=10+6X+Y/4
解方程组x+y/3=x-y/4 2x+3y=11
解方程组y=x+2,3x+2y=9和3x-4y=8,2x+2y=3
解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4