Translate problem to an equation and solve

Question

Ashanti and Landry are employees at the Soap 'n Suds Car Wash. If Ashanti can wash 3 can wash 5 cars per hour, how many hours will it take them to wash 56 cars?

Answer 1

If the problem is "Ashanti can wash 3 cars/hour and Landry can wash 5 cars/hours, how many hours will it take for them to wash 56 cars working together"?

Then, working together, they can wash

(3 + 5) = 8 cars/hour

then 56 cars/(8 cars/hour) = 7 hours