SOLUTION: James scored 77​, 81​, 70​, and 76 on four tests. What must he score on the next test to have an 80 average in the​ course?

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Question 1034849: James scored 77​, 81​, 70​, and 76 on four tests. What must he score on the next test to have an 80 average in the​ course?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Call the fifth score, x. Then we write
(77+81+70+76+x)/5 = 80
304 + x = 400
x = 96