Answer:

Explanation:
Okay, so the goal is to isolate c on one side with all the other terms on the other side. So, let's start by dividing both sides with 12h. After we do that, we will be left with
. Now, we can subtract both sides by b, and we will be left with
. Yay! We've now isolated c and that is our final answer!
Hope this helped! :)