Question

If the difference of two supplementary angles is 20°,then the angles

Answer 1

Let one angle be x and other be x+20.
Then
x+(x+20)=180
2x+20=180
2x=160
x=80°
Hence angles are 80° and (x+20)=100°.

Answer 2

Supplementary angles=180°
Let one angle be x and other x+20
A.T.Q.
x+x+20°=180°
2x+20°=180°
2x=180°-20°
2x=160°
x=160°÷2
x=80°

So,one angle=80°
Other angle=100°