Answer :

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

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