Answer:
There are 20 items on one grocery list and 13 items on second grocery list.
Explanation:
We are given that there are two grocery list and one of the grocery list have seven things less than the other grocery list.
Let x be the number of items on one grocery list.
Then, by the given information, there are x -7 items on the second grocery list.
The total number of items on both the list are 33.
Then, according to the question,

Thus, there are 20 items on one grocery list and (20 -7) = 13 items on second grocery list.