Determine all positive number replacements (less than the modulus) for the question mark that make the statement

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Determine all positive number replacements (less than the modulus) for the question mark that make the statement true.

4 · ? ≡ 4 (mod 10)

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A Survey Of Mathematics With Applications

ISBN: 9780135740460

11th Edition

Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde

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