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Question Number 5749 by FilupSmith last updated on 26/May/16
if a≡b(mod c)  does:  b≡a(mod c)  ???
$$\mathrm{if}\:{a}\equiv{b}\left(\mathrm{mod}\:{c}\right) \\ $$$${does}: \\ $$$${b}\equiv{a}\left(\mathrm{mod}\:{c}\right) \\ $$$$??? \\ $$
Commented by Rasheed Soomro last updated on 26/May/16
Of course.  If  m ∣ p ,so m ∣ −p  If c ∣ (a−b), then c ∣ (b−a)
$$\mathrm{Of}\:\mathrm{course}. \\ $$$$\mathrm{If}\:\:\mathrm{m}\:\mid\:{p}\:,\mathrm{so}\:\mathrm{m}\:\mid\:−{p} \\ $$$$\mathrm{If}\:\mathrm{c}\:\mid\:\left({a}−{b}\right),\:\mathrm{then}\:\mathrm{c}\:\mid\:\left({b}−{a}\right)\: \\ $$
Commented by FilupSmith last updated on 26/May/16
hmm. I think I understand.  I am having a hard time teaching  myself modulus    thank you!!
$$\mathrm{hmm}.\:\mathrm{I}\:{think}\:\mathrm{I}\:\mathrm{understand}. \\ $$$$\mathrm{I}\:\mathrm{am}\:\mathrm{having}\:\mathrm{a}\:\mathrm{hard}\:\mathrm{time}\:\mathrm{teaching} \\ $$$$\mathrm{myself}\:\mathrm{modulus} \\ $$$$ \\ $$$$\mathrm{thank}\:\mathrm{you}!! \\ $$

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