Given
[tex]\begin{gathered} 2(x+\frac{5}{2})=20 \\ \\ \end{gathered}[/tex]
Solution
[tex]\begin{gathered} 2x+5=20 \\ 2x=20-5 \\ 2x=15 \\ divide\text{ both sides by 2} \\ \frac{2x}{2}=\frac{15}{2} \\ x=7.5 \end{gathered}[/tex]
The final anwer
[tex]\frac{15}{2}\text{ or 7.5}[/tex]
