plz help. who ever gets correct gets brainliest

Answer:
19.2
Step-by-step explanation:
Hi there!
First, multiply both sides by 8 to isolate a.
Now, we just multiply [tex]\frac{8}{1}[/tex] and [tex]\frac{36}{15}[/tex].
When we do this, we get 288/15, or 19.2
I hope this helps!