conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: 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?
conversations.from: assistant
conversations.value: 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.