conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: You can buy 4 apples or 1 watermelon for the same price. You bought 36 fruits evenly split between oranges, apples and watermelons, and the price of 1 orange is $0.50. How much does 1 apple cost if your total bill was $66?
conversations.from: assistant
conversations.value: If 36 fruits were evenly split between 3 types of fruits, then I bought 36/3 = 12 units of each fruit
  If 1 orange costs $0.50 then 12 oranges will cost $0.50 * 12 = $6
  If my total bill was $66 and I spent $6 on oranges then I spent $66 - $6 = $60 on the other 2 fruit types.
  Assuming the price of watermelon is W, and knowing that you can buy 4 apples for the same price and that the price of one apple is A, then 1W=4A
  If we know we bought 12 watermelons and 12 apples for $60, then we know that $60 = 12W + 12A
  Knowing that 1W=4A, then we can convert the above to $60 = 12(4A) + 12A
  $60 = 48A + 12A
  $60 = 60A
  Then we know the price of one apple (A) is $60/60= $1