Question

If (2x + 30°) and (3x + 10°) are supplementary angles, then the value of x is

options:-
20°
56°
28°
86°

Answer 1

c. 28°

Explanation:

2x + 30° + 3x + 10° = 180° ( Sum )

or, 5x + 40° = 180°

or, 5x = 140°

or, x= 28° [ans]