SOLUTION: john has grades of 84 and 80 on his first two algebra test . if he wants an average of at least 78, what possible scores can he make on his third?

SOLUTION: john has grades of 84 and 80 on his first two algebra test . if he wants an average of at least 78, what possible scores can he make on his third?

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Question 778180: john has grades of 84 and 80 on his first two algebra test . if he wants an average of at least 78, what possible scores can he make on his third?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
(84+80+x)/3=78
x=234-164
x=70
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