若2x—3y=-3,则5-2x+3y=?
问题描述:
若2x—3y=-3,则5-2x+3y=?
答
5-2x+3y
=5-(2x-3y)
=5-(-3)
=5+3
=8
若2x—3y=-3,则5-2x+3y=?
5-2x+3y
=5-(2x-3y)
=5-(-3)
=5+3
=8