conversations.from: human
conversations.value: Solve the math problem: Mike spent 37 dollars on notebooks.  He bought a total of 12 notebooks.  He bought 3 red notebooks at 4 dollars each, 2 green notebooks at 2 dollars each, and the rest were blue notebooks.  How much does each blue notebook cost?
conversations.from: assistant
conversations.value: He bought 12-3-2=7 blue notebooks.
  He paid 3*$4=$12 for red notebooks
  He paid 2*$2=$4 for green notebooks
  He spent $37-$12-$4=$21 on blue notebooks.
  Each blue notebook costs $21/7=$3.