prompt: Sam and Drew have a combined age of 54. Sam is half of Drew's age. How old is Sam?
messages.content: Sam and Drew have a combined age of 54. Sam is half of Drew's age. How old is Sam?
messages.role: user
messages.content: Let x be Drew's age.
  Sam is (1/2)x
  x+(1/2)x=54
  (3/2)x=54
  3x=108
  x=<<36=36>>36
  Sam is 36/2=<<36/2=18>>18 years old
  #### 18
messages.role: assistant