SOLUTION: My average for my past five math test is 84. What must I get for my sixth math test to increase my average to 86.

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Question 743520: My average for my past five math test is 84. What must I get for my sixth math test to increase my average to 86.
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = your next grade should be
86 = (5(84) + x)/6
86 = (420 + x)/6
516 = 420 + x
516 - 420 = x
96 = x