Mary is baking a cake. The recipe calls for 11 cups of sugar and some more cups of flour. She already put in 3 cups of flour. If she still needs to add 6 more cups of flour how many cups of flour did the recipe require?
The recipe calls for 11 cups of sugar and some more cups of flour. She already put in 3 cups of flour. If she still needs to add 6 more cups of flour How many cups of flour did the recipe require?

We are looking for x, the number of cups of flour in the recipe. 

We know: 
3 cups of flour have already been added to the cake mixture
11 cups of sugar are called for in the recipe
and we need to add 6 more cups of flour

So we set up the equation: 
3 + x = 11 + 6 
or 
x = 11 + 6 - 3 

Therefore, the recipe requires 14 cups of flour in total.