Question: 3. (16 pts.) The message UG FTO was encoded using the linear cipher C = 21P + 2(mod 26). a) Solve this congruence for P

3. (16 pts.) The message UG FTO was encoded using the linear cipher C = 21P + 2(mod 26). a) Solve this congruence for P in terms of C; b) Decode the message

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