Question

An angle is three and a half times its complement. Find the angle.

Answer 1

so let the angle be x

so its complimentary is 90 - x 

so according to question   $3\frac{1}{2}x=90-x$

⇒ $\frac{9}{2}x = 90$

⇒ x = 20° ANSWER

Answer 2

let angle be x

complement=90-x

9/2x=90-x

x=20