Question

9x + 12 = 0

Explanation:

Step1: Isolate the term with $x$

Subtract 12 from both sides:
$9x + 12 - 12 = 0 - 12$
$9x = -12$

Step2: Solve for $x$

Divide both sides by 9:
$x = \frac{-12}{9}$
Simplify the fraction:
$x = -\frac{4}{3}$

Answer:

$x = -\frac{4}{3}$