What happens if cecil goes any nymber of feet in one direction and and then goes the same number of feet rhe other direction? where does he end up? how do you know

He'd end up where he started

Any number subtracted from the same number = 0

If you add the same number twice, and then remove it from it twice, it will also equal 0.

5 + 5 = 10

10 - 5 = 5 - 5 = 0

5 - 5 = 0