Answer:
The required inequity is:

The required solution is:

Explanation:
Consider the provided information.
The given statement is A number n is more than 9 units from 3.
Let the number 'n' is more than 9 units from 3.
Since more than 9 unit is distance, and distance can be in both the direction so take the absolute value as shown.

Thus, the required inequity is:

Now we can solve it as shown.


Hence, the required solution is:
