Question

If an angle is four times of its suppliment , then find that angle.

Answer 1

let the of the angle be x degrees. then the measure of its supplement is 180-x.
Angle =4×(its supplement)
⇒x=4(180-x)
⇒x=720-4x
⇒5x=720
⇒x=144

Answer 2

Let the angle be x.
Its supplement=180-x 
4 times the angle's supplement=4*(180-x)
Given, x=4(180-x)
or,x=720-4x
or,5x=720
or,x=720/5=144.
Ans:The angle is 144*.