Question #bfd0e

1 Answer
Nov 5, 2017

-3x + 12 and 12 - 3x are both correct and are exactly equivalent, as addition is commutative (meaning the order of operations doesn't affect the final answer).

Explanation:

For example, 0 -3 + 12 = 9 and 0 + 12 - 3 = 9
This is the case where x = 1 in your answer.

This is a great introduction to the commutative, associative and distributive properties:
https://www.mathsisfun.com/associative-commutative-distributive.html