misalkan A dan B himpunan. tunjukan bahwa (A-B)-C=(A-C)-Bmohon bantuannya

Minsalkan :
A={1,2,3,4,5,6,7,8,9,10}
B={2,4,6,8}
C={2,3,5,7}

Maka :
(A-B)-C=(A-C)-B
{1,3,5,7,9,10}-{2,3,5,7}={1,4,6,8,9,10}-{2,4,6,8}
{1,9,10} = {1,9,10}

sorry kalo salah