已知3x-5y=0,求x-2/x+3y

已知:3x-5y=0,求x/y,x-y/y,x-y/x 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知x,y>0 2x+y+3=xy 求5x+4y最小值 已知7x+5y/2y-x=3/2,且x≠0,求X/x-4y 已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)X(x-y) 已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 已知|3x-y|+|x+y|=0,求x-y除以x*y的值. 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 已知x-3y=0(y≠0)求2x+5y/3x-2y的值 已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值. 已知2x-y/7x+5y=2/3且y≠0,求x/y的值 已知（x+2）^2+|x+y+5|=0,求3x^2y-[2x^2y-(2xy-x^2y)-4x^2]-xy 已知3x-5y=0,求x-2/x+3y的值 已知3x-5y=0,求x-2/x+3y 已知x+y=0,求x^3+x^2*y+xy^2+y^3 已知|2x-3y|+|3x-y-1|=0,求x,y的值.