Mary is baking a cake. The recipe calls for 44 cups of flour and 25 cups of sugar. She already put in 50 cups of flour. How many more cups of sugar than cups of flour does she need to add now?
First, we need to figure out how many cups of flour she has used in total. We know that she started with 44 cups of flour, and then added 50 cups of flour. So, she has used 94 cups of flour in total. 

Next, we need to figure out how many cups of sugar she has used in total. We know that she started with 25 cups of sugar, but we don't know how many more cups of sugar she has added. 

Now we can set up an equation and solve it. We know that the recipe calls for 44 cups of flour and 25 cups of sugar. So, we can set up the equation: 

25 + x = 44

We want to solve for x, which is how many more cups of sugar than cups of flour she needs to add now. 

We can solve this equation by subtracting 25 from each side. This will give us: 

x = 19

So, she needs to add 19 more cups of sugar than cups of flour.