Question

The value of x or which (20x+5)° and
(x+25)° are supplementary angles is​

Answer 1

Answer:

Since 3x + 18° and 2x + 25° are supplementary angles

∴ 3x + 18° + 2x + 25° = 180°

⇒ 5x + 43° = 180°

⇒ 5x =180° - 43° = 137°

⇒ x = 137/5 = 27.4° or 27° 24’