conversations.from: human
conversations.value: Please show me the solution for: Bob has a certain number of marbles. If he receives 2 dozen more marbles, he will have 60 marbles. If he loses 10 of the marbles he has, how many marbles will Bob have?
conversations.from: assistant
conversations.value: Let B be the number of marbles Bob starts with.
  2 dozen marbles is 2 * 12 = 24 marbles.
  So after receiving 2 dozen more marbles, we know B + 24 = 60.
  This means B = 60 - 24 = 36.
  Bob ends with 36 - 10 = 26 marbles.