If you trying to answer what would be on all the sides if it were to be equal then 51 would be the answer if it's not what the question seems I will try and answer, but be more explanatory.
The answer is n=5. I worked it out
Answer:
I need to see the rest of the choices to be able to make a valid decision.
Step-by-step explanation:
I will update this as soon you edit the question