Answer:

Step-by-step explanation:
The commutative property for the addition states that when the order of two (or more) numbers is changed, the result of the addition does not change.
Mathematically, this means that:

where a, b are two numbers.
In this problem, we have the following addition:

By applying the commutative property, we can swap the order of the two variables y and j, and the result will remain the same. So we can write:
