tolong caranya yaa. makasihg

P = 7 / 8 Q
P = 7 / 8 (5x - 4)°
P + Q = 180°
[tex] \frac{7 (5x - 4)}{8} [/tex] + (5x - 4) = 180°
[tex] \frac{35x - 28}{8} [/tex] + [tex] \frac{8 (5x - 4)}{8} [/tex] = 180°
[tex] \frac{35x - 28}{8} [/tex] + [tex] \frac{40x - 32}{8} [/tex] = 180°
[tex] \frac{75x - 60}{8} [/tex] = 180°
75x - 60 = 1440
75x = 1500
x = 20°