Solve for a,a.

To solve the equation \(-a + 28 = 14\), we can follow these steps:

1. Subtract 28 from both sides of the equation:

\[
-a + 28 - 28 = 14 - 28
\]

This simplifies to:

\[
-a = -14
\]

2. Now, multiply both sides by -1 to solve for \(a\):

\[
a = 14
\]

So the solution is:

\[
a = 14
\]