For some integers a,b, a=b (mod x). Find x in terms of a and b.
It appears the answer is a-b, but I'm not sure how to prove it without modular arithmetic, which I don't really understand.
Is there a simple way to prove and explain this without mods?
What I'm seeing is that if you take the prime factors of (a-b) as a set
And take all length permutations of that set and then take the product of the elements in that permutation
All those values will be values of x such that a = b mod x
I don't know of any way to show this without using any modular arithmetic at all.