3x+7y=27 6x+5y=27 的方程组解

3x+7y=27 6x+5y=27 的方程组解 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 解二元一次方程组:{5(x+y)+3(x-y)=2{7(x+y)-3(x-y)=-6 解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 阅读下面方程组的解法:解方程组{x/5=y/7,x+y=-36 求x+y/3+x-y/2=6 3(x+y)-2(x-y)=28方程组的解 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 5(x+y)-2(x-y)=4 解方程组：x+y/2+x-y/3=6 4(x+y)-5(x-y)=12 解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2