prompt: Linda makes and sells necklaces at craft fairs. At her most recent fair she sold 4 necklaces and 8 rings for a total of $80. If each necklace costs $12, how much does each ring cost?
messages.content: Linda makes and sells necklaces at craft fairs. At her most recent fair she sold 4 necklaces and 8 rings for a total of $80. If each necklace costs $12, how much does each ring cost?
messages.role: user
messages.content: Let’s use r for the cost of each necklace
  4*12+8*r=80
  48+8*r=80
  8*r=80-48=32
  8r=32
  r=<<4=4>>4 dollars for each ring
  #### 4
messages.role: assistant