若2x+2y=6x-3y,则x比y=

若2x+2y=6x-3y,则x比y= 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 如果x比y=2比3那么x+y比y= ,y比x-y= 若2x=3y,则(x*x+y*y)/x*x=? 已知2x-3y=0则3x-y比x+2y= 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 若5x+3y=3x+4y=x+2y+6,则x+y=___ 若3x=7y,则y比x= ,x:（x+y）= 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 若x^2-y^2=6 x+y=3 则x-y=多少 若f(x+y,y/x)=x^2-y^2,则F(X,Y)= x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2 （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 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