若2x+3y=0,则2x+7y/4x-2y=______.

问题描述:

若2x+3y=0,则2x+7y/4x-2y=______.
要完整过程.
(y不等于0)

2x+3y=0
则2x=-3y
2x+7y/4x-2y
=(-3y+7y)/(-6y-2y)
=(4y)/(-8y)
=-1/2