y-(x-y)=8,x+(x-y)=29 求x,
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x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
y=x(x
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
y-(x-y)=8,x+(x-y)=29 求x,
x+x+x+x+y+y+y=56
(x+y)/y=8/3则x/y=__ y/x-y=___
(x+y)/y=8/3则x/y=__ y/x-y=___
y+y+x=10,x+y+x=8,y=?,x=?
12y(x-y)^2-8(x-y)^3=?
已知x-y=8,(x+y)(x-y)=32,求x,y的值
X+Y-8X+10Y+41=O,求X/Y-Y/X的值
x+x+x+y+y=6.4 y+y+y+x+x=7.1 怎么算?
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
x-y/x+y=(x-y)²/x²-y²(x≠y)