Answer:
I think its C you can hate how much you want if I'm wrong im more of a no tester when I get an answer i check but not online
Step-by-step explanation:
Solve for h.
h - 6 = 7
h = 7 + 6
h = 13
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check
13 - 6 = 7
7 = 7
the answer is good
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:)