word problems algebra

Question

Manuel drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took
7 hours. When Manuel drove home, there was no traffic and the trip only took
5 hours. If his average rate was
18 miles per hour faster on the trip home, how far away does Manuel live from the mountains?

Answer 1

r is the rate going to the mountain

r + 18 is the rate returning home

 

7r = 5(5r + 18)

 

Can you solve for r and answer?