Answer:
All real numbers b ∈
Step-by-step explanation:
First we solve the following inequality

Divide by 6 both sides of the inequality

The set of solutions is:

Now we solve the following inequality

Subtract 12 on both sides of the inequality


Divide by 2 on both sides of the inequality


The set of solutions is:

<em>Finally, the set of solutions for composite inequality is:</em>
∪ 
This is: All real numbers