To simplify the expression \(-9 - (-5)\), we first recognize that subtracting a negative number is the same as adding its positive counterpart. Therefore, we can rewrite the expression as:
\[ -9 + 5 \]
Now, we perform the addition:
\[ -9 + 5 = -4 \]
Thus, the simplified expression is:
\[ \boxed{-4} \]
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