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Best Answer] if Mod a minus b is equal to MOD a equal to mod b the angle between a vector and b - Brainly.in
![elementary number theory - Given that a and b are integers, a ≡ 4 (mod 13), and b ≡ 9 (mod 13). Find c where c ≡ 9a (mod 13). - Mathematics Stack Exchange elementary number theory - Given that a and b are integers, a ≡ 4 (mod 13), and b ≡ 9 (mod 13). Find c where c ≡ 9a (mod 13). - Mathematics Stack Exchange](https://i.stack.imgur.com/k6Lke.png)
elementary number theory - Given that a and b are integers, a ≡ 4 (mod 13), and b ≡ 9 (mod 13). Find c where c ≡ 9a (mod 13). - Mathematics Stack Exchange
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