mohon dibantu ya terimakasi

(2x)° + (3x - 20)° = 180°
= 5x - 20 = 180
= 5x = 180+20
= 5x = 200
= x = 200/5
= x = 40°

sudut QRP = 2x = 2 . 40 = 80°
sudut QPR = 180 - (80 + 40) = 180° - 120° = 60°
kalau salah maaf