To rewrite the expression \( 4x + (5x + 3) \) using the Associative Property of Addition, you can change the grouping of the terms. The Associative Property states that the way in which numbers are grouped in addition does not change their sum.
Here’s the rewritten expression:
\[ (4x + 5x) + 3 \]
Both forms are equivalent, and this demonstrates the use of the Associative Property of Addition.