Find the measure of an angle if its measure is 4 times the measure of its complement.?

Question

Find the measure of an angle if its measure is 4 times the measure of its complement.?

Answer 1

a=90 - b

b=4a

thus

a=90-4a

5a=90

a=18 and b = 72

Answer 2

If the angle is a, its complement is (90 - a) and it says here that

a = 4(90 - a)

5a = 360

a = 72 degrees

check: its complement is 90 - 72 = 18 deg, and a = 4*18, check.

Answer 3

owwww my brain hel;p!