Question

Find the value of x if one exterior angle of a regular octagon is 9x+18

Answer 1

The sum of the measures of a polygon's exterior angles is always 360. 
(9x+18)8=360 
Simplify
72x+144=360
Subtract 144 on both sides
72x=216
Divide by 72 on both sides
x=3
I hope this helped!

Answer 2

x = 567 i think im not really sure