解方程组 1.x=2y+3 x-3y=20 2.x-y=13 x=6y-7
解方程组 1.x=2y+3 x-3y=20 2.x-y=13 x=6y-7
解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6
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
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
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
求x+y/3+x-y/2=6 3(x+y)-2(x-y)=28方程组的解
3/x+y+2/x-y=6,3(x+y)-2(x-y)=28解这个方程组
解方程组 x-y/3-x+y/4=2 x-y/6-x+y/8=3
解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4