SOLUTION: solve: 4^3a-5=20 please help i hope you can thanks so much

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Question 48404: solve: 4^3a-5=20
please help
i hope you can
thanks so much
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
4%5E%283a+-+5%29+=+20
%283a+-+5%29%2Alog%2810%2C4%29+=+log%2810%2C20%29
a+=+%28log%2810%2C20%29%2Flog%2810%2C4%29+%2B+5%29%2F3
About 2.3870