Answer:80
Step-by-step explanation:if you multiply a times 20 to get 5, you have to multiply b times 20 to get 80
15/3=5
The temperature goes down 5 degrees in 1 hour.
You have to get p by itself so add 18 to Both sides and -18 + 18 is 0 and 18+3 is 21 so p=21
