Question

Simplify 5m - 13n - n + 4m.

Answer 1

so what you need to do is put the like terms together. so you have m and n

solve these equations i'm giving you

5m+4m= _____

-13n-n=_____

and keep in mind that for the second problem, you can also do plus negative n :) what did you get?

Answer 2

... you could also rearrange it so that the same unknowns are close to each other like:
5m+4m-13n-n

And you can do what iheartfood told you to get the answer :)