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5x = 0 (mod 6) 5x ≡ 0 (mod 6) 5x(mod 6) = 0 (mod6) 5x mod 6 = 0 mod 6

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Sorry, it's really confusing and there are nothing about it in my lecture notes.

1 Answers 1

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Yes. These are several ways to express exactly the same thing. Namely, that $6$ divides $5x$.

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    It's just different notation. Expressed in words, it's: "$5x$ is equivalent to $0$, *modulo* $6$."2012-10-27