prompt: Mr. and Mrs. Boyden take their 3 children to a leisure park. They buy tickets for the whole family. The cost of an adult ticket is $6 more than the cost of a child ticket. The total cost of the 5 tickets is $77. What is the cost of an adult ticket?
messages.content: Mr. and Mrs. Boyden take their 3 children to a leisure park. They buy tickets for the whole family. The cost of an adult ticket is $6 more than the cost of a child ticket. The total cost of the 5 tickets is $77. What is the cost of an adult ticket?
messages.role: user
messages.content: Let X be the cost of an adult ticket.
  So the cost of a child ticket is X-6.
  The total cost of the 5 tickets is X*2 + 3*(X-6) = 77.
  X*2 + 3*X - 3*6 = 77.
  5*X - 18 = 77.
  5*X = 77 + 18 = 95
  X = <<19=19>>19
  #### 19
messages.role: assistant