Together Felipe and Emilio needed a combined time of 7.5 years to build their homes. Felipe finished in half the time of Emilio. How many months did it take Felipe to build his house?
Stream of thoughts:
30
Let F = the number of years Felipe needed to build his house.

Emilio = 2F.

3F = 7.

5 years.

F = 2.

5 years.

2.

5 years = 30 months.

It took Felipe 30 months to build his house.

.

Therefore, the answer is 30