Final answer:
The equation 12+6+15-12+(6+15) illustrates the commutative property of addition.
Step-by-step explanation:
The commutative property of addition states that the order of numbers being added does not affect the result. This means that the numbers can be added in any order and the sum will remain the same. In the given options, the equation 12+6+15-12+(6+15) illustrates the commutative property of addition.
Learn more about Commutative property of addition