Let's solve this expression step-by-step:

$-9 - (-5)$

When you subtract a negative number, it's the same as adding the positive version of that number:

$-9 + 5$

Now, perform the addition:

$-9 + 5 = -4$

So, the result is:

$-4$

Would you like any further explanation, or do you have more questions?

Here are five related questions you might find helpful:

1. How do you simplify expressions involving multiple negative numbers?
2. What is the difference between subtracting and adding negative numbers?
3. How do parentheses affect the order of operations?
4. What is the result of multiplying two negative numbers?
5. How do you solve an expression with a combination of addition and subtraction?

Tip: When you see two negative signs together (like in $-9 - (-5)$), remember that they convert to addition.