5(X+Y)=330 (X-Y)*33=330解方程
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(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
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
x+y=5; x^y+y^x=17
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y=
化简 x / y(x+y) - y / x(x+y) =
(X-Y)(X+Y)=5 能解么
5x-4y(y-x)=?
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
y-x=x-5
x+y=16 5x-6y=33
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
Y={X (-5
Y={X (-5
2(x-y)=5y,x-y=-5