Three families bought food at a baseball game. The Castillo family
spent $27.50 on 2 burgers, 3 fries, and 4 drinks. The Peterson family
spend $26.50 on 3 burgers, 2 fries, and 3 drinks. The Barbour family
spent $27 on 2 burgers, 4 fries, and 2 drinks. What system of
equations could be used?