Answer:
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Step-by-step explanation:
First verify it holds for n=1
then you are allowed to assume it holds for n and you can start with the induction step
for n+1 instead of inserting it into the equation, add it to both sides and transform it to the original formula to proof its equality

this equals the original formula if you had inserted n+1, proving the correctness
Read method 2 of the article to understand how to do it:
https://www.wikihow.com/Balance-Chemical-Equations
Let h = amount of hours

Since they earn $7.50 per hour, we can multiply that by an unknown amount of hours to get $116.25. Let's solve:

Divide both sides by 7.5 to isolate the h, amount of hours.

Simplify.

In conclusion, someone would have to work 15.5 hours to earn $116.25 if they earn $7.50 per hour.