SOLUTION: you have two test grades one of 84 and 82. what must you get on the third test to have an average of 85

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Question 584328: you have two test grades one of 84 and 82. what must you get on the third test to have an average of 85
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
(84+82+x)/3=85
x=89
another way
85-84=1
85-82=3
85+1+3=89