Y=500-5X(0
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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*x+2x+y*y-4y+5=0 x= y=
(5x-6y)(x+y)=0(x不等于y),则y/x=
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知5x-4y=0,求x:y和x+y:y的值
4x=5y (y不等于0).则有.y.y/x.x-y.y=?
先化简,再求值:[3x-2/x+y(x+y/3x-x-y)]/(x-y/x),其中5x+3y=0
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
设x、y满足条件x-y+5>=0,x+y>=0,x
已知x,y满足约束条件x-y+5>=0 x+y>=0 X
已知x,y满足x-y+5>=0,x+y>=0,x
已知X,Y满足约束条件x-y+5>=0 x+y>=0 X
x*x+y*y-2x+4y+5=0求x,
Y=500-5X(0
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值