若3x+3y=5.则9x+9y+6的值是"
问题描述:
若3x+3y=5.则9x+9y+6的值是"
答
9x+9y+6
=3(3x+3y)+6
=3x5+6
=21
若3x+3y=5.则9x+9y+6的值是"
9x+9y+6
=3(3x+3y)+6
=3x5+6
=21