-9 - (-3) =

-6, because you do -9+3.

Thank you!

To solve the expression -9 - (-3), we need to follow the rules of arithmetic, specifically the rules for subtracting negative numbers.

Step 1: Simplify the expression.
When subtracting a negative number, we can think of it as adding the opposite. So, -9 - (-3) can be rewritten as -9 + 3.

Step 2: Perform the addition.
-9 + 3 equals -6.

Therefore, -9 - (-3) is equal to -6.