6X^2+7XY-5Y^2=0(Y≠0),则X/Y＝__如果有回答合乎情理的我会适当给分，^2就是平方的意思

已知x/2=y/3（xy≠0）,求x²-2xy-3y²/x²-6xy-7y²的值 已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值 已知X-XY-2Y=0求2X+3XY-Y/X-2XY+5Y 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 5x^2-7xy-6y^2=0 x^2-4xy+5y^2+6y+9=0,x+y= 已知x+y=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___ 已知x^2+y^2-4x+6y+13=0求(xy+y^2/5x^2-5xy+xy+y^2)·（5/x+y）-（y/x-y） 已知x²+5xy-6y²=0且y≠0,求值:(1)x/y;(2)2x-3y/3x-2y 已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) 已知7x^2+5y^2=12xy.xy≠0,则x/y为 解二元二次方程组：6x^2-5xy+y^2=0 ,x^2+xy+y^2=7 解二元二次方程组：6x^2-5xy+y^2=0 ,x^2+xy+y^2=7 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 5x^2+7xy+6y^2=0求x/y 已知x^2+9y^2-2x-6y+2=0,求{-（xy/（x-y）^2}^4*(y^2-xy/x)^3*x^4/y^10/(x/xy-y^2)^5的值 已知x大于0 y大于0 且x+6y=5根号xy 求x+根号xy+2y分之2x+根号xy-y的值已知x大于0 y大于0 且x+6y=5根号xy求x+根号xy+2y分之2x+根号xy-y的值 已知x>0,y>0,x+根号xy-6y=0,求4x+5根号xy-6y分之x+2根号xy