Question

-9 = -11 + \frac{b}{8}

Explanation:

Step1: Add 11 to both sides

$-9 + 11 = -11 + \frac{b}{8} + 11$
$2 = \frac{b}{8}$

Step2: Multiply both sides by 8

$2 \times 8 = \frac{b}{8} \times 8$
$16 = b$

Answer:

$b = 16$