What must be added to -23 to get `-9`?

Answer

To solve the question "What must be added to -23 to get -9?", we can follow these steps:

### Step 1: Set Up the Equation
Let \( x \) be the number that we need to add to -23. According to the question, we can write the equation as:
\[ -23 + x = -9 \]

### Step 2: Isolate \( x \)
To find \( x \), we need to isolate it on one side of the equation. We can do this by adding 23 to both sides of the equation:
\[ x = -9 + 23 \]

### Step 3: Perform the Addition
Now, we will perform the addition on the right side:
\[ x = 14 \]

### Conclusion
Thus, the number that must be added to -23 to get -9 is:
\[ \boxed{14} \]

---