conversations.from: human
conversations.value: Janet has 9 cards more than Brenda. Mara has twice as many cards as Janet. How many cards do they have in all if Mara has 40 cards less than 150?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: Mara has 150 - 40 = 110 cards.
  Janet has 110/2 = 55 cards since Mara has twice as many as Janet.
  Brenda has 55 - 9 = 46 cards since Janet has 9 cards more than Brenda.
  Therefore, they all have 110 + 55 + 46 = 211 cards.