Question

Let A, B and C be the sets such that A ∪ B = A ∪ C and A ∩ B = A ∩ C. show that B = C.

Answer 1

Using what?

Answer 2

what do u want 2 say

Answer 3

Well, when I want to prove that two sets are equal, the most straightforward way of doing it is to show that they are subsets of each other.