10. The Pizza Shack is famous for its thick-crust pizza. Last Wednesday, the Divita, Lee, and Washington families all ate at the Pizza Shack.
The Divitas ordered a cheese pizza with pepperoni and mushrooms, a cheese pizza with
garlic and olives, and five soft drinks. Their bill was $26.25.
The Lees ordered a cheese pizza with sausage, onions, and green peppers and three soft
drinks. Their bill was $14.75.
The Washingtons were having a birthday party. They ordered five cheese pizzas, three with
just pepperoni and two with pineapple and Canadian bacon. They also ordered 12 soft drinks.
Their bill was $61.50.
Write and solve a system of equations to find the price of a plain cheese pizza, the price of each
topping, and the price of a soft drink. (Assume that the price for each topping is the same and
that the bills do not include tax or tip.) (5)