apa ya jawaban nomor 8?

sudut P + sudut Q = 180°
[7/8 (5x-4)] + [5x-4] = 180°
[(35x - 28)/8] + [5x-4] = 180°
(35x - 28 + 40x - 32) / 8 = 180°
75x - 60 = 180° × 8
75x - 60 = 1440°
75x = 1440° + 60
x = 1500° / 75 = 20°

semoga bs membantu :)