prompt: Since Jason started investing, he has earned the same amount he invested twice over in 5 months. If Jason's investment currently is worth $90, how much has he been earning per month from his investment assuming he has been earning an equal amount of returns each month?
messages.content: Since Jason started investing, he has earned the same amount he invested twice over in 5 months. If Jason's investment currently is worth $90, how much has he been earning per month from his investment assuming he has been earning an equal amount of returns each month?
messages.role: user
messages.content: Let's say Jason invested x amount of money.
  Since Jason started investing, he has earned the same amount he invested twice over in 5 months, meaning he has earned x+2*x=$90
  This evaluates to 3x=$90
  The total amount of money that Jason invested is x=$90/3
  Jason invested x=$30
  The total amount of money that Jason has earned from his investments is $90-$30=$<<90-30=60>>60
  If he earned an equal amount of money from the investment in five months, his monthly returns is 60/5=$<<60/5=12>>12
  #### 12
messages.role: assistant