I'm sorry, but the given equation is not correct.
If you meant to write: n - 15 = 7 + 15, then the equation would be:
n - 15 = 22
To solve for n, you would add 15 to both sides of the equation:
n - 15 + 15 = 22 + 15
Simplifying:
n = 37
n - 15 = 7 + 15?
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