已知x+2+|y-3|=0
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)X(x-y)
已知x+2+|y-3|=0
已知2x+3y=2(x>0,y>0),求x+y最大值
已知|2x-3y|+|3x-y-1|=0,求x,y的值.
已知4x-2y=0,求x-y/3x+2y的值
已知x,y>0 2x+y+3=xy 求5x+4y最小值
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知x^2-3y^2=2xy(x>0,y>0),求代数式x+2y/x-y
已知x>0 y>0 (2x+3y)(3x+2y)=75 求x+y的最小值.
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值