解方程组3y-2x=17 4x+2y=7
解方程组:2x-3y=9(1),7x+4y=17(2)
解方程组2x-5y=7 3x+4y=17
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
解方程组X+Y/2=3X-2Y=10+6X+Y/4
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组x+y/3=x-y/4 2x+3y=11
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
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
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2
2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51 解方程组