To solve the equation -21 = -8 + n :
1. Start by isolating the variable n on one side of the equation.
2. Add 8 to both sides to cancel the -8 on the right side:
-21 + 8 = -8 + n + 8
3. This simplifies to:
-13 = n
4. Therefore, the value of n is:
n = -13