(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

For what conditions on sets A and B does A-B = B-A hold?

2. Relevant equations

A - B = A n B^c

B - A = B n A^c

3. The attempt at a solution

I know that A = B is the answer, but I just don't know where to start...please don't give me the whole proof, I want to figure it out myself. I just need a hint or an idea of where to start.

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# Homework Help: A - B = B - A only if A = B

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