Respuesta :

Answer:

Step-by-step explanation:

6 pizzas = 39 cups of flour

1 pizza = 39/6 cups of flour

4 pizzas = 39*4/6 cups of flour = 39*2/3 = 26 cups of flour

26 cups of flour = 4 pizzas

13 cups of flour = 4/2 = 2 pizza