Answer:
9 + 2b
Step-by-step explanation:
combine like terms, (7+2) (3b-b)
Answer:
9 +2b
Step-by-step explanation:
If you take the 7 and the 2 and add them you get 9 and the negative b then adds with the 3b, you would subtract the 1b from the 3b and get positive 2b.