We need to simplify the next algebraic expression:
In this case 13x and 18x are like terms because they share the same letter(s) and power(s).
So 13x + 18x = 31x
but they are not like terms with 16y because they dont share the same letter.
So 13z + 16y + 18x = 31x + 16y
Then 31x + 16y is the answer.