To solve the equation \(-9(x - 5) = 45\), the first step is to divide both sides by \(-9\) to isolate the term with \(x\).
This gives us:
\[ x - 5 = -5 \]
The second step, then, is to add \(5\) to both sides of the equation to isolate \(x\):
\[ x = -5 + 5 \]
Hence, the second step in solving the original equation when solving for \(x\) is:
Add 5 to both sides.