Explanation:

1. Solve the given equation for x:

   $9+x=6$

   Subtract $9$ from both sides:

   $x = 6 - 9$

   $x = -3$

2. Substitute the value of x into the expression to be evaluated:

   The expression is $-18-2x$ .

   Substitute $x = -3$ :

   $-18 - 2(-3)$

3. Calculate the value:

   $-18 - (-6)$

   $-18 + 6$

   $= -12$

4. Compare with the given options:

   @[A] $-12$ - This matches our calculation.

   @[B] $-2$

   @[C] $6$

   @[D] $24$

5. Conclusion:

   The value of $-18-2x$ is $-12$. The correct answer is A.