Robert is baking a cake.
The recipe calls for more than 7 cups of sugar.
He has already added 2 cups.
Let x represent the number of more cups to be added.
Then the sum of x and 2 cups must be greater than 7 cups of sugar.
Mathematically,

We can solve the above inequality for x
Subtract 2 from both sides of the inequality

Therefore, the solution of the inequality is x greater than 5.
This means that we need more than 5 cups of sugar for the recipe.