Respuesta :

From the figure we see that the angles shown are alternate interior angles, then they are equal, hence

[tex]9x+7=10x-10[/tex]

Solving for x, we have

[tex]\begin{gathered} 9x+7=10x-10 \\ 7+10=10x-9x \\ 17=x \end{gathered}[/tex]

Then x=17 degrees.

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