若5 x-6y=0,且xy不等于0,则5 x-4y除以5x-3y的值等于

已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) X²-5XY-6Y²=0,且xy不等于0,则X/Y的值为? 若3x^2+3xy=0且xy不等于0,则x:y= 若5 x-6y=0,且xy不等于0,则5 x-4y除以5x-3y的值等于 已知x+y=2xy,且xy不等于0,则求-2x+6xy-2y/(7x+5y)-9xy-(3x+y)=___ 已知xy不等于0,且2x^2+5xy-3y^2=0,则x^2-y^2/xy的值是? 已知x*x-2xy-3y*y=0且x不等于0 y不等于0,那么5x-4y/5x+4y= 已知xy/5=y+z/6=z+x/7,且xyz不等于0,求x:y:z 若x,y不等于0,且x+y=xy,则x分之1+y分之1的值为? 已知2x^2+5xy-7y^2=0,且y不等于0 求x/y的值 已知：x^2 + xy - 6y^2=0,且xy不等于0求2x^2-3xy+y^2/5x^2-7xy+2y^2的值 已知2x2+5xy-3y2=0且xy不等于0,求x:y的值已知2x2+5xy-3y2=0且xy不等于0,求xy的值 已知x²-5xy-6y²=0(y不等于零且x不等于0)求y分之x 若1+x与1-y互为倒数,且xy不等于0,则1/x-1/y= 若1+x与1+y互为倒数,且xy不等于0,则1/x+1/y= 已知x^2-6y^2=-xy,x>0,y>0且x不等于y.则（x+3y）/（x-y）的值为_____? 已知5x-4y=0且xy不等于0,求x^2+y^2/x^2-y^2-x+y/x-y的值 已知,xy不等于0,且3x方-2xy-8y方=0,则x分之y等于