Answer:
[tex]x=5\\z=94[/tex]
Step-by-step explanation:
As they are vertical angles
∴[tex]7x+51=86\\=>7x=35\\x=5[/tex]
And,
∴[tex]86+86+z+z=360\\=>2z=188\\z=94[/tex]
I have added an image for your further observation
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