Brandon has a cup of quarters and dimes with a total value of $3.80. the number of quarters is 4 less than twice the number of dimes. how many quarters and how many dimes does brandon have?

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?