To solve the equation \( 7(n - 3) = -21 \), follow these steps:
- Start by dividing both sides of the equation by 7:
\[ n - 3 = \frac{-21}{7} \]
- Simplify the right side:
\[ n - 3 = -3 \]
- Next, add 3 to both sides of the equation to isolate \( n \):
\[ n = -3 + 3 \]
- Simplifying gives:
\[ n = 0 \]
So the solution is:
\[ n = 0 \]