10. Prove the following proposition: Proposition 1. Let p.9 € N be coprime and let x be an integer satisfying x = p (mod 9) x=9 (mod p) then x = p+q (mod p9). [3 marks]

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10. Prove the following proposition: Proposition 1. Let p.9 € N be coprime and let x be an integer satisfying x = p (mod 9) x=9 (mod p) then x = p+q (mod p9). [3 marks]

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