John and 4 friends are going out for pizza for lunch. They split one pizza and 5 large drinks. The pizza cost $10.00. After using a $4.00 gift certificate,

Question

 they spend a total of $13.50. Write an equation to model this situation, and find the cost of one large drink.

Answer 1

c represents the cost on a drink

13.50 = 10.00 + 5c

Can you solve for c?

(Who gets the fifth drink?)