Please solver number 11) solve for x step by step explanation

Given:
EF + FG + GH = EH
Substitute the expressions, we have:
[tex]x-8+2x-8+9=23[/tex]Simplify and solve for x:
[tex]\begin{gathered} 3x-7=23 \\ 3x-7+7=23+7 \\ 3x=30 \\ \frac{3x}{3}=\frac{30}{3} \\ x=10 \end{gathered}[/tex]Answer: x = 10