To solve the equation \( s - \frac{7}{2} = 4 \), you can isolate \( s \) by adding \( \frac{7}{2} \) to both sides.
Starting with the equation:
\[ s - \frac{7}{2} = 4 \]
Add \( \frac{7}{2} \) to both sides:
\[ s = 4 + \frac{7}{2} \]
To add these together, you can convert 4 into a fraction with a denominator of 2:
\[ 4 = \frac{8}{2} \]
So now the equation looks like this:
\[ s = \frac{8}{2} + \frac{7}{2} \]
Now, combine the fractions:
\[ s = \frac{8 + 7}{2} = \frac{15}{2} \]
Thus, the value of \( s \) is
\[ s = \frac{15}{2} \] or \( s = 7.5 \).