Respuesta :
3a * 3b = 9ab
9ab / 3c = (3ab)/c
((3ab)/c) / 3d =
((3ab)/c) * (1/3d) =
(ab)/(cd)
9ab / 3c = (3ab)/c
((3ab)/c) / 3d =
((3ab)/c) * (1/3d) =
(ab)/(cd)