y=x+5中,若x=-3则y=?
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若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y=
若3x=5y,则x:y=________,(x-y):y=______
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
(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
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
若2x=5y,则下列式子中错误的是() A x/y=5/2 B y/x=2/5 C x+y/x=7/5 D x-y/y=3/2
(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.
若x-y=3,则-x+5+y=( )
若2x=3y,则(x*x+y*y)/x*x=?
若x:y=3则x:(x+y)=
y=x+5中,若x=-3则y=?
若5x+3y=3x+4y=x+2y+6,则x+y=___
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
若x-y=5,(x+y)²=3则x²+y²=?
若(3x-2y)/(x+y)=2/3,则3x/5y=
若x/y=4/3 则3x+2y/2x-5y=