I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS :)

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Plzzz answer both questions and i will give you 100 points