Question

the difference in the measures in the two complimentary angle is 12 degree find the measures of the angle

Answer 1

by given,
(180°-x)-x=12°
=> 180 - 2x =12
      180- 12 =2x
      168       =2x
thus     x=84°

Answer 2

we two complementry angle sum is 90
x+y=90
x-y=12
2x=102
x=51
y=90-51=39