To solve the equation \( x + 23 = 9 \), we need to isolate \( x \).
Subtract \( 23 \) from both sides of the equation:
\[ x + 23 - 23 = 9 - 23 \]
This simplifies to:
\[ x = 9 - 23 \] \[ x = -14 \]
Therefore, the solution to the equation is \( -14 \).
The correct response is: −14 (negative 14).