Can you please show me step by step for this math that makes me undertandable. Q: Determine which of the following congruences have solutions, and find any solutions (between 0 and the modulus) by trial and error. (a) 4x ≡ 5 (mod 6). (b) 6x ≡ 3 (mod 9). (c) x 2 ≡ 2 (mod 4)

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