已知1/x+1/y=3,求分式(3x-3xy+3y)/(x+xy+y)的值

已知1/x+1/y=3,求分式(3x-3xy+3y)/(x+xy+y)的值 已知1/x+1/y=3,求分式3x-2xy+3y/x+xy+y的值 已知1/x-1/y=3,求分式3x-xy+3y/x+xy+y的值. 已知,1/x+1/y=5.,求分式3x+xy+3y/x-2xy+y的值 已知xy/x+y=二分之一,求分式3x-xy+3y/x-xy+y的值 已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值. 1/x+1/y=3.求分式3x-2xy+3y/x+xy+y的值 解一道分式题已知1/x-1/y=3 求分式(4x-5xy-4y)/(3x-2xy-3y)的值. 已知1/x-1/y=3,求分式(2x+3xy-2y)/(x-2xy-y) 初中数学分式已知x/y=2,求（x*x-xy+3y*y）/x*x+xy+6y*y的值 若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值 八下数学分式（1）已知1/x-1/y=5,求分式3x+5xy-3y/x-3xy-y的值（2）已知x+1/x=3,求分式x