X+Y=10009.93%x+25%y=100
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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+Y=10009.93%x+25%y=100
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
(x+y)(x+y-10)+25=0,且x-y=3,求x,y
(x+y)(x+y-10)+25=0,且x-y=3,求x,y
x+x+x+x+y+y+y=56
已知X*X+Y*Y+6X-8Y+25=0 求(Y/X)+(X/Y)-2=?
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x-y/x+y=(x-y)²/x²-y²(x≠y)
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