SOLUTION: lisa has an average of 88 on 8 math tests. what grade must she score on the next test to bring her final average to 90?

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Question 834284: lisa has an average of 88 on 8 math tests. what grade must she score on the next test to bring her final average to 90?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let A through H be the grades on her first 8 tests,
%28A%2BB%2BC%2BD%2BE%2BF%2BG%2BH%29%2F8=88
A%2BB%2BC%2BD%2BE%2BF%2BG%2BH=704
Now adding the next test, S,
%28A%2BB%2BC%2BD%2BE%2BF%2BG%2BH%2BS%29%2F9=90
%28704%2BS%29%2F9=90
704%2BS=810
highlight%28S=106%29
I hope they give 6 extra credit points.