Answer:
-16
Step-by-step explanation:
Multiply both sides of the equation by 4/3.
[tex]\dfrac{3}{4}g=-12\\\\\dfrac{4}{3}\cdot\dfrac{3}{4}g=-12\cdot\dfrac{4}{3}\\\\g=-\dfrac{48}{3}\\\\\boxed{g=-16}[/tex]