Question 316526
You have the equation for cookies based on the number of people.
In order to get the number of people, you need to know the number of cookies and conversely if you want to get the number of cookies, you need to know the number of people. 
Unfortunately, you only have the equation. 
The value of the number of cookies was cut off. 
There is no way to determine without that other piece of information.
Please re-post.