Asked by jack

Two trains leave a train station at the same time. One travels east at 10 miles per hour. The other train travels west at 9 miles per hour. In how many hours will the two trains be 85.5 miles apart
Answered by Reiny
let the time be t hours
so 10t + 9t = 85.5

I will let you finish it.
Answered by Patricia
4.5 hours