posted by Cecilia (Again) .
Okay, this isn't really a big question. I know how to do it, there's just one thing I have to make sure of.
The problem is:
I know I need to combine like terms, but which sign do I use to do that.
Like if I want to combine 5x and 11x, do I use the sign before the 11x (-) of the sign after 5x (+) ????