SOLUTION: how to compute the next grade if the average is given? ex. average= 90 scored= 86+92+89+88+?

Question 659111: how to compute the next grade if the average is given?
ex.
average= 90
scored= 86+92+89+88+?
Answer by colliefan(242) (Show Source): You can put this solution on YOUR website!
Write what you know as the equation that would be used to calculate an average and then solve for the unknown.

AMP Parsing Error of [450=((86+92+89+88+x)]: Invalid expression. Closing bracket expected at /home/ichudov/project_locations/algebra.com/templates/Algebra/Expression.pm line 187. .

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