SOLUTION: Her average was 91 after her sixth test it went to 89 what was her score on the sixth test

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Question 1108101: Her average was 91 after her sixth test it went to 89 what was her score on the sixth test
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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Her average was 91 after her sixth test it went to 89 what was her score on the sixth test
:
let x = the score on the 6th test
%28%285%2891%29+%2B+x%29%29%2F6+=+89
455 + x = 6(89)
x = 534 - 455
x = 79% on the 6th test