Respuesta :

texaschic101

Answer:

Step-by-step explanation:

proportion time...

3 teaspoons salt to 4 cups flour = x teaspoons salt to 28 cups flour

 3        x

----- = ----- cross multiply

4        28

(4)(x) = (3)(28)

4x = 84

x = 84/4

x = 21 <==== 21 teaspoons of salt are needed