comparison math problem

Question

A pizza restaurant ran a deal where the cost of 2 pizzas and delivery was the same as 3 pizzas minus 6$. What is the cost of one pizza?

Answer 1

2P + D = 3P-6

D = P-6

Each Pizza cost $6 more than the cost of delivery

If delivery cost $5, then each pizza cost $11

If delivery cost $4 then each pizza cost $10

If delivery is free each pizza cost $6