Provide the reason for Step 4 in the following proof. Prove:

Chart with two columns and four rows. The first column is labeled Statements and the second column is labeled Reasons. First column row one: negative open parenthesis a plus b close parenthesis plus a equals negative a plus negative b plus a. Second column row one: Distributive property. First column row two - equals negative a plus a plus negative b. Second column row two - Communicative Property of Addition. First column row three - equals zero plus negative b. Second column row three - Additive Inverse Property. First column row four - equals negative b. Second column row four is blank.

Commutative Property of Addition

Identity Property of Addition

Additive Inverse Property

Definition of Subtraction