Question

Find the measure of an angle whose supplement is three times its complement

Answer 1

180-x=3(90-x)
180-x=270-3x
2x=90
x=90/2
x=45

Answer 2

let,
the angle = x
according to the question,
(180-x) = 3(90-x)
180 - x = 270 -3x
-x+3x = 270-180
2x = 90
x = 45