If you combine both of these inequalities, you will get
-9 ≤ 6q + 9 ≤ 9
You can further simplify this be using the absolute value.
If you use the absolute value, you will get
| 6q + 9 | ≤ 9
If you're trying to solve for q, use
-9 ≤ 6q + 9 ≤ 9
Subtract all parts by 9
- 18 ≤ 6q ≤ 0
Divide all parts by 6
- 3 ≤ q ≤ 0
Have an awesome day! :)