Answer:
45 deg
Step-by-step explanation:
Given Angle PSR = 99°
From figure, we can see that
Angle PSR
= PSQ + QSR = (3x + 18) + (9x - 27) = 12x -9
Equating this equation with given value for PSR
12x - 9 = 99
12x = 108
x = 9
Hence PSQ = 3x + 18 = 3(9) + 18 = 45 deg
