Answer:
64
Step-by-step explanation:
m∠S = 74
m∠S = 5x + 19
5x + 19 = 74
5x = 74 - 19
5x = 55
x = 55 / 5
x = 11
m∠Q = 3x + 31
= 3 ( 11 ) + 31
= 33 + 31
m∠Q = 64
