tolong dijawab.... besok hrs dikumpul

[tex]2p + 20 + 50 = 180 \\ 2p = 180 - 20 - 50 \\ 2p = 110 \\ p = \frac{110}{2} \\ p = 55[/tex]

[tex]3p + x = 180 \\ 3 \times 55 + x = 180 \\ 165 + x = 180 \\ x = 180 - 165 \\ x = 15[/tex]

Jadi, jawabannya D. 15°