Question #bfd0e

1 Answer
Nov 5, 2017

Answer:

#-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