Question

A restaurant offers delivery for their pizzas.The total cost is a delivery fee added to the price of the pizzas.One customer pays $25 to have 2 pizzas delivered.Another customer pays $58 for 5 pizzas.How many pizzas are delivered to a customer who pays $80?

Answer 1

x-the cost of one pizza

y-the cost of delivery

2x+y=25

5x+y=58 ->3x=33->X=11->y=3

so,the number of delivered pizzas to the person

num=(80-3)/11=7

Explanation: