Question

Question #bfd0e

Answer 1

`-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