Solution:
Given the equation:
[tex]v=\frac{r-s}{2}[/tex]
To solve for the variable r,
step 1: Multiply both sides by 2.
This gives
[tex]\begin{gathered} 2\times v=2\times\frac{r-s}{2} \\ \Rightarrow2v=r-s \end{gathered}[/tex]
step 2: Add s to both sides of the equation.
Thus, we have
[tex]\begin{gathered} s+2v=r-s+s \\ \Rightarrow r=2v+s \end{gathered}[/tex]
Hence, we have
[tex]r=2v+s[/tex]
The correct option is
