In the adjoining figure, what value of x will make AOB, a straight line?
X=28°
AOB is a straight line
Therefore, ∠AOB = 180°
⇒ (3x +20)° + (4x -36)° = 180°
⇒ 3x + 20° + 4x - 36° = 180°
⇒ 7x - 16° = 180°
⇒ 7x = 196°
⇒ x = 28°