解方程组{ (x-y)/3=(x+y)/2 { 2x-5x=7
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解方程组{ (x-y)/3=(x+y)/2 { 2x-5x=7
解方程组{ (x-y)/3=(x+y)/2
{ 2x-5x=7
{2x-5y=7
解方程组{ (x-y)/3=(x+y)/2
{ 2x-5x=7
{2x-5y=7
![解方程组{ (x-y)/3=(x+y)/2 { 2x-5x=7](/uploads/image/z/15807024-0-4.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84%7B+%28x-y%29%2F3%3D%28x%2By%29%2F2+%7B+2x-5x%3D7)
2(x-y)=3(x+y) 即 x+5y=0
2x-5y=7 上边的式子加下边的 得到 3x=7 所以x=7/3 y=-7/15
2x-5y=7 上边的式子加下边的 得到 3x=7 所以x=7/3 y=-7/15
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
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
解方程组﹛2(x+y)-3(x-y)=1 6(x+y)+7(x-y)=51
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
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{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5)
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
解方程组:3分之x-y=2分之x+y 2x-5y=7