X=3Y Y=X-24
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x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做.
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
化简 x / y(x+y) - y / x(x+y) =
化简 x-y/(y-x)^3=
(x+y)(2x-3y)=?
若x+y=3 x²-y² 则x-y=?若x+y=3 x²-y²=24 则x-y=?
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3
已知3x =2y 求x/x+y+y/x-y-y²/x²-y²
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
已知x-y=3,求[(x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值