What is the angle of the measurement whose angle is 4 times its complement?

Let the angle be x

supplementary = 180 - x

complementary = 90 - x

As per the given dа ta:

4 (90 - x) = 180 - x

360 - 4x = 180 - x

360 - 180 - 4x = - x

180 - 4x = - x

180 = 4x - x

180 = 3x

180/3 = x

x = 60