To solve the equation \( \frac{7^?}{7^5} = 7^{12} \), we can use the properties of exponents. Specifically, we can use the quotient rule, which states that \( \frac{a^m}{a^n} = a^{m-n} \).
Applying this rule, we have:
\[ \frac{7^?}{7^5} = 7^{? - 5} \]
Setting this equal to \( 7^{12} \), we get:
\[ 7^{? - 5} = 7^{12} \]
Since the bases are the same, we can set the exponents equal to each other:
\[ ? - 5 = 12 \]
To find \( ? \), we solve for \( ? \):
\[ ? = 12 + 5 = 17 \]
Thus, the missing number is \( \boxed{17} \).
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