已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
已知|3-y|+|x+y|=0,求x+yxy
已知x和y满足2x+3y=5,则当x=4时,代数式3(xXx)+12xy+(yXy)的值是( )
X+y=4,Xy=-12 求(1)XxX+yxy (2)XxXxy+Xxyxy
若正数x,y满足2x+y-3=0,则x+2yxy的最小值为( )
在分式2x+3yxy中,x、y的值都扩大到原来的2倍,则分式的值( )
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知3X=5Y,则X:Y=
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
已知:4x = 5y,求(x+y) :y