若5x-4y=0且xy≠0,则x:y=
已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)
若X>1,Y>0,且满足XY=X的Y次方,X/Y=X的3Y次方,则X+Y等于?
若5x-6y=0,且xy≠0,则10x-4y/10x-3y的值等于
若x>1,y>0且满足xy=xy,xy=x
已知x²-4xy+4y²=0,且xy≠0,那么x-y/x+y
已知x-y=4xy且xy≠0,求代数式-x-2xy+y分之2x+3xy-2y的值
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*
若(x-4y)(x+3y)=0 且xy>0 则分式x+3y/2x-y的值为
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5x-4y=0且xy不等于0,求x^2+y^2/x^2-y^2-x+y/x-y的值
若3x^2+3xy=0且xy不等于0,则x:y=
已知x>0,y>0,且x+4y=1,则xy的最大值?