We ordered w pizzas. Each pizza has the same number of slices. If there were a total of x slices How many slices are there in each pizza?
First, we need to find out how many slices are in each pizza. We know that there were a total of x slices, and we know that there were w pizzas. This means that the number of slices in each pizza must be x/w. 

Therefore, the answer (symbolic expression) is: 

x/w