Bantuin saya ? pake rumus nya ya.....

2x+3×-20= 180
5x-20 = 180
5x= 200
X= 40

=2×
=2.40= 80

80+40= 120
180-120 = 60

Jawabanya c

<QRP + < QRS = 180°
2x + 3x - 20 = 180
5x = 180 + 20
x = 200/5 = 40

< QRP = 2x = 2(40) = 80
< PQR + < QRP+ < QPR = 180
40 + 80 + < QPR = 180
< QPR = 180 - 120 = 60° (C)

Semoga membantu.....