California
Team Travel
Question

The 57 players on 4 soccer teams traveled to a soccer tournament in Plainville. Each car carrying the members of the same team had the same number of players in it.
- The 15 players on the Barracudas rode 3 to a car.
- The Sharks and the Dolphins had 3 fewer players on each team than the Barracudas had.
- The Sharks had 1 more player in each car than the Dolphins had.
- The Stingrays had 6 players per car.
In all, how many cars did the soccer players take to the tournament?