To solve the equation \( x + 23 = 9 \), you can isolate \( x \) by subtracting 23 from both sides:
\[ x + 23 - 23 = 9 - 23 \]
This simplifies to:
\[ x = 9 - 23 \]
\[ x = -14 \]
So, the solution is \( -14 \).
The correct response is:
−14 (negative 14).