To solve the equation, we can use the exponent rule for division of exponents.
When dividing two exponents with the same base, you subtract the exponents.
Therefore,
x^? / x^8 = x^15
Using the exponent rule, we can rewrite the equation as:
x^(? - 8) = x^15
Since the bases are equal, the exponents must also be equal.
Therefore,
? - 8 = 15
Solving for ?, we have:
? = 15 + 8
? = 23
So, the value of ? is 23.