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1. \(a \equiv a \pmod{n}\text{.}\)

2. If \(a \equiv b \pmod{n}\) then \(b \equiv a \pmod{n}\text{.}\)

3. If \(a \equiv b \pmod{n}\) and \(b \equiv c \pmod{n}\text{,}\) then \(a \equiv c \pmod{n}\text{.}\)