Answer:
The first step would be to simplify. In this case, your coefficient is a -2. Divide each side by negative 2, leaving you with
(3x + 8) + 1 = -5.
Then, expand.
3x + 8 + 1 = -5
3x + 9 = -5
Subtract 9 from each side
3x = -14
Divide.
x = -14/3
Hope that helped!