Respuesta :

Answer:

division

Step-by-step explanation:

12( d/4 - 5) = 69

divide everything by 4 you get

3(d-1.25)=17.25

distribute

3d - 3.75 = 17.25

+3.75 = +3.75

3d=21

divide

21/3 = 7

d = 7

the last operation was division