conversations.from: human
conversations.value: I would love to understand how to solve this problem: It took Dad 5 more than twice as long to vacuum upstairs then to vacuum downstairs. He vacuumed for a total of 38 minutes. How many minutes did he vacuum upstairs?
  Can you explain?
conversations.from: assistant
conversations.value: Let D = time in minutes to vacuum downstairs
  Upstairs = 2D + 5 minutes
  3D + 5 = 38
  3D = 33
  D = 11 minutes
  Upstairs = (2 * 11) + 5 = 27 minutes
  Dad took 27 minutes to vacuum upstairs.