SOLUTION: If I recieve an 85%, 88%, 87% and 75% on four math tests, what score would I need for the 5th test to recieve an overall grade of 83%

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Question 726994:

If I recieve an 85%, 88%, 87% and 75% on four math tests, what score would I need for the 5th test to recieve an overall grade of 83%
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
(85+88+87+75+x)/5=83
(335+x)/5=83 cross multiply.
335+x=83*5
335+x=415
x=415-335
x=80 needed for the 5 th. test to have an 83 average.