SOLUTION: how do you re-write 3^x=90 as a logarithm and solve it?

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Question 457492: how do you re-write 3^x=90 as a logarithm and solve it?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
3%5Ex=90
take log base 3 of both sides:
log%283%2C3%5Ex%29+=+log%283%2C90%29
applying the "change of base" to the right:
x+=+log%2890%29%2Flog%283%29%29
x+=+4.096%29