Given f, of, x, equals, minus, x, minus, 5f(x)=−x−5, find f, of, 0f(0).

To find \( f(0) \) given the function \( f(x) = -x - 5 \), we simply need to substitute \( x = 0 \) into the function.

\[ f(0) = -0 - 5 \] \[ f(0) = -5 \]

Thus, \( f(0) = -5 \).