Tolong yang nomor 2 yah

a.
→ PQR + QPS = 180
2x + 3x - 5 = 180
5x = 180 + 5
5x = 185
x = 185 / 5
x = 37

QPS = 2x
QPS = 2(37)
QPS = 74

b.
→ QRS + PSR = 180
100 + y + 15 = 180
y = 180 - 100 - 15
y = 80 - 15
y = 65

QRS = y + 15
QRS = 65 + 15
QRS = 80