SOLUTION: betty earned grades of 85, 73 and 90 on her first three exams. what grade must she earn on her fourth exam in order that her overall average is exactly 85?

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Question 928917: betty earned grades of 85, 73 and 90 on her first three exams. what grade must she earn on her fourth exam in order that her overall average is exactly 85?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
x = 4(85) - (85+73+90)