5 Answers

I like to rearrange the equation to get like terms next to eachother. Everything attached to the variable p goes together, and everything that's just an integer goes together.
4p+9+(7p)+2  Equation
4p+(7p)+9+2  Rearrange
3p+9+2  Combine p terms
3p+11  Combine constants

I think your question is wrong.
Anyhow solution is
4p + (7p) +9+2 just rearrange
= 3p+11 that is all.

4p+9+(7p)+2=?
4p+97p+2=?
4p7p+9+2?=0
3p+11?=0
3p+?=11

since all you have is adding just add the common variables. So in this case you want to add 4p and (79) together and you should get 3p. Then you add 9 and 2 and you get 11. So your answer will be 3p+11=?

3p+11