To evaluate the expression \( n + p + q \) for \( n = -12 \), \( p = 3 \), and \( q = -13 \), we simply substitute the values into the expression:
\[ n + p + q = -12 + 3 + (-13) \]
Now, we can perform the addition step-by-step:
-
First, calculate \( -12 + 3 \): \[ -12 + 3 = -9 \]
-
Next, add \( -13 \): \[ -9 + (-13) = -9 - 13 = -22 \]
Thus, the value of the expression is:
\[ \boxed{-22} \]