Extra Credit

Mr. Suliga is offering extra credit to those able to solve this last problem on our homework.
He wants us to show our work since he says we won't need to guess, but also gave us the hint that H is not 5.

The answer to this puzzle is a single word.

When you think you have the answer, add "-[your answer]" (no brackets, spaces, quotations) to the end of this URL in all capital letters.

The image is also available here.

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Click here to see the solution

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