SOLUTION: If log81^x=-3/4 then x=?

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Question 1189149: If log81^x=-3/4 then x=?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If log81^x=-3/4 then x=?
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If you mean common logs, base 10:
log(81^x) = -3/4
x*log(81) = -3/4
x+=+-%283%2F4%29%2Flog%2881%29
x =~ -0.39298