how many dogs are terriers

Question

there are 5 times as many yellow labs as terriers in the dog park. if there are a total of 18 dogs, how many dogs are terriers?

 

Answer 1

there are 5 times as many yellow labs as terriers

l = 5t

a total of 18 dogs

l + t = 18, t = 18 - l

Substitute:

l = 5(18 - l)

l = 90 - 5l

6l = 90

l = 15

 t = 3