There is a theorem regarding mod properties such that when a=a'(mod(adsbygoogle = window.adsbygoogle || []).push({});

c) and b=b'(mod c) then a*±b=a'±b' (mod c) right?

Now, 5=5 mod7. applying it to the above, 10=10 mod7, which is not

true since 3=10 mod7. Why? I'm confused.

Thanks

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# Theorem regarding mod properties

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