Let's solve the equation by taking all the numbers to one side and variable to one side.
Remember, side change = sign change
So, we have:
[tex]\begin{gathered} 2x-13=9 \\ 2x=9+13 \\ 2x=22 \end{gathered}[/tex]Now, we solve for x by dividing both sides by 2:
[tex]\begin{gathered} 2x=22 \\ \frac{2x}{2}=\frac{22}{2} \\ x=11 \end{gathered}[/tex]