Need answer help

Question

The freshman class wants to plan a party for June to celebrate the big accomplishment of surviving their first year. They have to decide if they are going to order pizza from Pizza Hut or Dominoes. Pizza Hut charges a delivery fee of $10 plus $5 for each pizza. Dominoes charges a delivery fee of $15 plus $4.50 for each pizza. When will the two pizza companies charge the same amount? 

How many pizzas?  

How much will it cost? $ 

Answer 1

when 10+5p = 15 +4.5p

.5p = 5

p = 10 pizzas when cost is the same of $60 total