Question

an angle y is 3 times its complement. angle y is________

Answer 1

y+1/3y=90
4/3y=90
y=90*3/4
y=135/2
y=67.5

Answer 2

let 1st angle be y
then 2nd be angle 3y
A.T.Q
3Y +Y =90
4Y=90
Y=90÷4
Y=22.5
3Y =22.5×3
3Y=67.5