Question

the difference two complementary angles is 18 degrees then find the anglez

Answer 1

let X be one angle
Y be another angle

x+y=90
x-y=18
using elimination method

2x=108
x=54
y=36

Answer 2

let one angle be x
and other be 90°-x

A.T.Q
90°-x-x=18°
90° -2x =18°
90°-18° =2x
72°=2x
x=72°/2
x= 36°
so , 1st angle is 36° and second angle is 90°-36° =54°