Respuesta :

Answer:

a = 5.5

Step-by-step explanation:

3 (40 - 2) + 5 = 12a - 1

120 - 60 + 5 = 12a - 1

60 + 5 = 12a - 1

65 = 12a - 1

+1            +1

66 = 12a

/12     /12

5.5 = a

a = 5.5