若2x+3y=0,则2x+7y/4x-2y=______.要完整过程.(y不等于0)
问题描述:
若2x+3y=0,则2x+7y/4x-2y=______.
要完整过程.
(y不等于0)
答
2x+3y=0
则2x=-3y
2x+7y/4x-2y
=(-3y+7y)/(-6y-2y)
=(4y)/(-8y)
=-1/2