Answer :
n = 96 - 3d
63 = 96 - 3d
3d = 96 - 63
3d = 33
d = 33/3
d = 11.
He had been eating it for 11 days.
63 = 96 - 3d
3d = 96 - 63
3d = 33
d = 33/3
d = 11.
He had been eating it for 11 days.