Question

1. \\ -12 = 9 + \frac{x}{3}

Explanation:

Step1: Subtract 9 from both sides

$-12 - 9 = 9 + \frac{x}{3} - 9$
$-21 = \frac{x}{3}$

Step2: Multiply both sides by 3

$-21 \times 3 = \frac{x}{3} \times 3$

Answer:

$x = -63$