A box has y oranges. 5 oranges are rotten and removed. The remaining oranges are placed equally into

A box has y oranges. 5 oranges are rotten and removed. The remaining oranges are placed equally into 2 containers . Each container has ______oranges

Remove 5 rotten oranges means we subtract 5 from y:
y - 5

If each of the two remaining boxes contains an equal amount of the remaining oranges, we have:
(y - 5)/2 oranges in each box