已知x-y=3xy,则2x+3xy−2yx−2xy−y=_.

问题描述:

已知x-y=3xy,则

2x+3xy−2y
x−2xy−y
=______.

∵x-y=3xy,

2x+3xy−2y
x−2xy−y

=
2(x−y)+3xy
(x−y)−2xy

=
6xy+3xy
3xy−2xy

=
9xy
xy

=9,
故答案为:9.