conversations.from: human
conversations.value: I'm completely lost with this math problem: James won a money prize at a charity raffle. He donated half of his winnings back to the charity, then spent $2 on a hot dog to celebrate his win. He had $55 left over. How many dollars did he win?
  Can you give me a hand?
conversations.from: assistant
conversations.value: Let W be equal to James’s raffle winnings.
  He donated half his winnings, so he had W - W/2 = W/2 left.
  He then spent $2 on a hot dog, so W/2 - 2 = $55.
  Thus, half his winnings is W/2 = 55 + 2 = 57.
  James won W = 57 * 2 = $114.