Answer:
133.33
Step-by-step explanation:
we have to take percentage down and multiply
It's d 780 because you multiply 13 by 5 then multiply that answer by 12 and you get 780
10 and12 is the correct answer
After having done this on paper:

We want to isolate the variable, and the first step is to subtract the 8.

Since the <em>n</em> is being multiplied by 3, and that = 8, we can multiply both sides by 3.
<em>n</em> = 24
Let me know if this helped you understand better.
Also, you can check this by substituting in 24 for <em>n</em>.