conversations.from: human
conversations.value: Megan pays $16 for a shirt that costs $22 before sales. What is the amount of the discount?
  Solve this problem.
conversations.from: assistant
conversations.value: Let x be the amount of the discount.
  We have, 22 - x = $16
  We change the writing of the equation:
  22 - x + x = 16 + x
  So, 22 = 16 + x
  We then Remove 16 from both sides:
  22 - 16 = 16 + x - 16
  So, 22 - 16 = x
  So, the amount of the discount is x = $6.