conversations.from: human
conversations.value: Tanya makes a salt scrub from salt, oil, fragrance, citrus zest, and sugar. She makes enough to fill a 10-ounce jar each time. She uses the same amount of citrus zest as fragrance and the same amount of salt as sugar. She uses twice as much oil as salt and twice as much salt as zest. How many ounces of oil does she use?
conversations.from: assistant
conversations.value: Let Z be the ounces of zest Tanya uses.
  Tanya uses the same amount of fragrance as zest, so she uses Z + Z = 2Z fragrance and zest.
  She uses twice as much salt as zest, so she uses 2Z salt.
  She uses the same amount of sugar as salt, so she uses 2Z + 2Z + 2Z = 6Z fragrance, zest, salt, and sugar.
  She uses twice as much oil as salt, so she uses 2 * 2Z = 4Z oil.
  In all, she uses 6Z + 4Z = 10Z = 10 ounces of fragrance, zest, salt, sugar, and oil.
  Thus, she uses Z = 10 / 10 = 1 ounce of zest.
  Thus, Tanya uses 4Z = 4 ounces of oil.