Respuesta :

3x+18+9x - 27 = 99
12x - 9 = 99
12x = 108
    x = 9
m<PSQ = 3x + 18
m<PSQ = 3(9) + 18
m<PSQ = 27 + 18
m<PSQ = 45

answer
C. 45
Answer is Canswernis c 45