Question

find the angle which is 5 times its complement.

Answer 1

Let angle be x

Complement = 90-x

A/q,
          x = 5(90-x)

     ⇒ x = 450 - 5x    ⇒ 6x = 450    ⇒ x = 75

∴ The angle which is 5 times its complement is 75°

Answer 2

$\huge\star\bold\red{Hello!}$

$\small\sf{Let\:angle\:be\:x}$

$\small\sf{Complement=90-x}$

$\Large\mathtt{A/Q,}$

$\longrightarrow$$\small\sf{x=5(90-x)}$

$\longrightarrow$$\small\sf{x=450-5x}$

$\longrightarrow$$\small\sf{6x=450}$

$\longrightarrow$$\small\sf{x=75}$