战国立志传升级档破解:若[(x-3)y]/[(3-x)(y-1)]=y/(1-y)成立,则x的取值为_____
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x不等于3
若 x/3y = y/2x-5y =6x-15y/x
已知X+Y=-4,求1/2(X+Y)+4(X-Y)-3(X-Y)-3/2(X+Y)-X+Y
(x-y)^3*(x-y)^2*(y-x)
3X(X-Y)+2Y(X-Y)
(x-y)4*(y-x)3=(y-x)7 ()
若x : y : z =1 :3 :5 则x+3y-z /x-3y+z=? 若x /y+z=y /x+z=z /x+y=k 则k=?
(x+y)^3÷(x+y)=?
(x-y)^2×(y-x)^3=???
规定运算&,使得X&Y=X*X-Y*Y/X*X+Y*Y,则求(-1/2)&(-1/3)
已知|Y/X|=3 求 [(X^2+2XY+Y^2)/X^2Y^2][(x-y)/(x-2y)]