Question

find the angle whose complement is one third of its supplement

Answer 1

let the angle be x

complementary angle = 90 - x

supplementary angle = 180 - x

90 - x = 1/3 ( 180 - x )

270 - 3x = 180 - x

2x = 90

x = 45 °

Answer 2

1 : 90-x=1/3(180-x)
2: 90-x=60-x/3