To recieve a C grade, a student must average more than 77 but less than or equal to 85. If Noah recieved a C in the course and had five grades of 73, 85, 73, 69, and 78 before taking the final exam, what were the possible grades for his final if there were 100 points possible? (Assume all six grades are weighted equally and let x represent the unkown score

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