Answer:
D) Jenny and Pat all together have 3n + 20 cookies, Jenny has 6n plus 5 cookies more than and Pat. How many cookies does Jenny have?
Explanation:
The given equation is:

The situation that is represented here is :
D: Jenny and Pat all together have 3n + 20 cookies, Jenny has 6n plus 5 cookies more than and Pat. How many cookies does Jenny have?
Basically we have to find the cookies that Jenny has. It is given that jenny has 6n+5 cookies that is equal to the number of cookies Jenny and Pat both have, i. e 3n+20.