Math Word problem

Question

kala drove to the mountains last weekened. There was heavy raffic on the way there, and the trip took 10 hours. when kayla drove home, there was no traffic and the trip took 7 hours. if her average rate was 18 miles per hour faster on the trip home, how far away does kala live from the mountains?

Answer 1

 

 Distance = rate x time

 

 

    R is the rate of speed

 

  R*10 = (R+18)*7

 

  10R = 7R + 126

 

  3R = 126

 

 R=42

 

 42*10 = 420

 60*7 = 420

 

420 miles