Question 319469
 Tom scored 75, 78, 87, 81 and 76 on five exams. What grade must Tom obtain on his sixth exam to have an average of 80?
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Let the 6th grade be "x".
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Equation:
Solve for "x".
(75+78+87+81+76+x)/6 = 80
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Cheers,
Stan H.