Respuesta :

4=.4(3d-5)
4=1.2d-2
6=1.2d
d=5
4 = 0.4 (3d - 5)
4 = 1.2d - 2
4 + 2 = 1.2d - 2 + 2
6 = 1.2d
6/1.2 = 1.2d/1.2
5 = d