The problem asks to solve the linear equation $\frac{b}{3} + 15 = -8$ for the variable $b$.

1. Problem Description

The problem asks to solve the linear equation $\frac{b}{3} + 15 = -8$ for the variable $b$.

2. Solution Steps

We are given the equation $\frac{b}{3} + 15 = -8$.

First, we subtract $15$ from both sides of the equation:

$\frac{b}{3} + 15 - 15 = -8 - 15$

$\frac{b}{3} = -23$

Next, we multiply both sides of the equation by $3$:

$3 \times \frac{b}{3} = 3 \times (-23)$

$b = -69$

3. Final Answer

$b = -69$