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

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- October 5th 2011, 12:08 PMdwsmithMod 5
How do I show that this (see below) has no solutions?

- October 5th 2011, 12:19 PMTheEmptySetRe: Mod 5
- October 5th 2011, 12:34 PMdwsmithRe: Mod 5