prompt: In a school, the number of participants in the 2018 Science Quiz Bowl was 150. There were 20 more than twice the number of participants in 2019 as there were in 2018. In 2020, the number of participants was 40 less than half the number of participants in 2019. How many more participants were there in 2019 than in 2020?
messages.content: In a school, the number of participants in the 2018 Science Quiz Bowl was 150. There were 20 more than twice the number of participants in 2019 as there were in 2018. In 2020, the number of participants was 40 less than half the number of participants in 2019. How many more participants were there in 2019 than in 2020?
messages.role: user
messages.content: Twice the number of participants in 2018 is 150 participants x 2 = <<150*2=300>>300 participants.
  The number of participants in 2019 was 300 participants + 20 participants = <<300+20=320>>320 participants.
  Half the number of participants in 2019 is 320 participants /2 = <<320/2=160>>160 participants.
  The number of participants in 2020 was 160 participants - 40 participants = <<160-40=120>>120 participants.
  There were 320 participants - 120 participants = <<320-120=200>>200 more participants in 2019 than in 2020.
  #### 200
messages.role: assistant