Question

an angle is equal to one third of its supplement find its way vision

Answer 1

Let the angle be a

Suplement = 180 - a

According to question

a = (180-a) / 3

=> 3a = 180 - a

=> 4a = 180

=> a = 45

Required angle = 45°

Answer 2

let the angle x then its supplement = 180-x
therefore x = 1/3(180 - x )
x = 60 - x/3
x + x/3= 60
4x = 180
x = 180/4
x = 45

hope this will help you