Sx+1 - - 2x = 3; 2

It looks like you have an equation that needs to be solved. Given the equation you've provided:

\[ \frac{Sx + 1}{2} - 2x = 3 \]

Let's solve for \(S\) and \(x\).

1. First, eliminate the fraction by multiplying the entire equation by 2:

\[ Sx + 1 - 4x = 6 \]

2. Rearrange the equation to group like terms:

\[ Sx - 4x + 1 = 6 \]

3. Subtract 1 from both sides:

\[ Sx - 4x = 5 \]

4. Factor out \(x\) from the left side:

\[ (S - 4)x = 5 \]

5. Now you can solve for \(x\):

\[ x = \frac{5}{S - 4} \]

Now you have expressed \(x\) in terms of \(S\). If you have a specific value for \(S\), you can substitute it in to find the value of \(x\). Alternatively, if you have further instructions or another equation, please provide!