SOLUTION: if a student scores 68 79 74 on 3 math tests what is the next number to make this student have an 80 average?

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Question 1020099: if a student scores 68 79 74 on 3 math tests what is the next number to make this student have an 80 average?
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
(68+79+74+x)/4 = 80
(221+x)/4 = 80
221+x = 320
x = 99
Better hit the books! ;-)