How do I show that this (see below) has no solutions?

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- October 5th 2011, 11:08 AMdwsmithMod 5
How do I show that this (see below) has no solutions?

- October 5th 2011, 11:19 AMTheEmptySetRe: Mod 5
- October 5th 2011, 11:34 AMdwsmithRe: Mod 5