Respuesta :
d + 3 = 2(9 - d)
d + 3 = 18 - 2d
d = 18 - 2d - 3
d = -2d + 15
3d = 15
d = 5
hope this helped, God bless!
d + 3 = 18 - 2d
d = 18 - 2d - 3
d = -2d + 15
3d = 15
d = 5
hope this helped, God bless!