Francesca is making a recipe that calls for 5 cups of flour. in total, she has 25 cups of flour. let f represent the amount of flour she has left after making the recipe. which equation shows an equality between two different ways of expressing the amount of flour francesca uses in the recipe? a: 5=25f b. 5= 25/f c. 5= 25 + f d. 5= 25 - f plz quick!