Which values of x and y will satisfy y = 5x and 12x + 9y = 60? . a. . x = 1, y = 19 . b. . x = 35 y= 20/19. c. . x = 1/20 y = 1/90. d.. x = 20/19 y = 100/19. e.. x = 19 y = 50/19

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?