To solve the equation \(-a + 28 = 14\), we can follow these steps:
- Subtract 28 from both sides of the equation:
\[ -a + 28 - 28 = 14 - 28 \]
This simplifies to:
\[ -a = -14 \]
- Now, multiply both sides by -1 to solve for \(a\):
\[ a = 14 \]
So the solution is:
\[ a = 14 \]