conversations.from: human
conversations.value: Maryann spends seven times as long doing accounting as calling clients. If she worked 560 minutes today, how many minutes did she spend calling clients?
  What is the solution?
conversations.from: assistant
conversations.value: Let a be the amount of time Maryann spends doing accounting and c be the amount of time she spends calling clients: We know that a + c = 560 and a = 7c.
  Substituting the second equation into the first equation, we get 7c + c = 560
  Combining like terms, we get 8c = 560
  Dividing both sides by 8, we get c = 70