Question

Which is NOT an example of the commutative property of addition?

x + (-13) = -13 + x

2 + x + 5 = 2 + 5 + x

x - 13 = 13 - x

-x + 5 = 5 + (-x)

Answer 1

x - 13 = 13 - x

Explanation:

The commutative property of addition is a+b=b+a

The third equation is the only one not following the rule. It states that a-b=b-a, whoich is not true.

For exaple, 2-1 is not equal to 1-2.