SOLUTION: On the first 5 tests of her chemistry class, Emily got an average score of 88. What does she need on the next test to have an overall average of 90?

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Question 734312: On the first 5 tests of her chemistry class, Emily got an average score of 88.
What does she need on the next test to have an overall average of 90?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
((5*88)+x)/6=90
440+x=90*6
440+x=540
x=540-440
x=100