conversations.from: human
conversations.value: I'm stuck on this math problem: Rajesh walked 10 kilometers less than 4 times the distance that Hiro walked. Together they walked 25 kilometers. How many kilometers did Rajesh walk?
  Can you help?
conversations.from: assistant
conversations.value: Let H = distance Hiro walked
  4H - 10 = distance Rajesh walked
  H + 4H - 10 = 25
  5H - 10 = 25
  5H = 35
  Hiro walked 7 km so Rajesh walked 4(7) - 10 = 18 km
  Rajesh walked 18 kilometers.