解方程组2/(x+y)-1/(x-y)=3 3/(x+y)+4/(x-y)=10,设1/(x+y)=m,1/（x-y)=n,将原方程化为2m-n=3,3m+4n=10,解得m=2,n=1.∴原方程组的解为x=3/4,y=-(1/4).请用这种方法解（x+y)/2+(x-y)/3=7 (x+y)/3-(x-y)/4=-1

二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组二元一次方程组 2(X+Y)-(X-Y)=3 (X+Y)-2(X-Y)=1 解方程组:x+y=2x+y+1=5x+2y+1 解方程组 x+y=1 |√(x+2)+y-√(x-2)+y|=2 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 解方程组,(x+y)^2-3(x+y)=0和x-y=1 方程组{ X+Y=1 X-Y=2a }的解满足 {x>0 y 利用图像解方程组解方程组2x-y=1,x+2y=3 解方程组：解方程组：｜X+Y｜=1｜X｜+2｜Y｜=3 解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7 解方程组{(x-2)(y+3)=(x+1)(y-1) {(x+1)(y+1)=(x-1)(y+5) 解二元一次方程组 ：2(x+y)=2[(x-1)+(y-1)] 、x/y=x/y+1 要求 解方程组：｛(X-1)(Y+1)=(X+1)(Y+1)｛X(2+Y)-6=Y(X-4) 2x+2y-x+y=3;x+y-2x+2y=1 方程组的解 数学书解方程组{2(x+y)-(x-y)=3,（x+y)-2(x-y)=1 解方程组2(x-y)/3-x+y/4=-1 6(x-y)-4(2x-y)=16 解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12) 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 解方程组 3(x+y)-2(x-y)=9,5(x+y)+2(x-y)=-1