tolong diberi cara dan jawaban nya

[ P3 = Q3 ]

4x - 18 = 2x + 24
4x - 2x = 24 + 18
2x = 42
x = 42 / 2
x = 21

P2 = 180 - P3
P2 = 180 - (4x - 18)
P2 = 180 - (4 (21) - 18)
P2 = 180 - (84 - 18)
P2 = 180 - 66
P2 = 114