prompt.content: Janey has 3 more than twice the number of books that Sally has. If Janey has 21 books, how many does Sally have? Let's think step by step and output the final answer after "####".
prompt.role: user
extra_info.answer: Let x be the number of books that Sally has
  Janey has 3+2x books
  3+2x=21
  2x=18
  x=<<9=9>>9
  #### 9
extra_info.question: Janey has 3 more than twice the number of books that Sally has. If Janey has 21 books, how many does Sally have?
extra_info.split: test