6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
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6(x-y)-2(x+y)=143(x-y)+(x+y)=56(x-y)-2(x+y)=143(x-y)+(x+y)=56(x-y)-2(x+y)=143(x-y)+(x+y)=5设x-y=mx+y=
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
设x-y=m x+y=n
则6m-2n=14 3m+n=5
解得 m=2 n=-1
即x-y=2 x+y=-1
解得x=1/2 y=-3/2
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
（x+y）/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
解下列方程组:{x+y/2+x-y/3=6 {4(x+y)-3(x-y)=14{x+y/2+x-y/3=6{4(x+y)-3(x-y)=14
x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y
解方程组4（x+y)-3(x-y)=14;(x+y)/2+(x+y)/3=6
4(x+y)-3(x-y)=14,x+y/2 + x-y/3=6 用简便方法能解吗?
已知：2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x)
因式分解3x^2(x-y)+6x(y-x)