Royce walks 3/4miles to school and 3/4 miles home each day. in how many days will he have walked 3 miles?

In two days should would have walked three miles.

Work:

(3/4 = 0.75)

0.75 miles to school + 0.75 miles home = 1.5 miles in all

3 miles / 1.5 miles = 2.

So it will take 2 days to walk 3 miles.