SOLUTION: i need help with solving logs solve the equation 6^(x-1)-3=9 thanks

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: i need help with solving logs solve the equation 6^(x-1)-3=9 thanks      Log On


   

Question 749469: i need help with solving logs
solve the equation
6^(x-1)-3=9
thanks
Found 2 solutions by josgarithmetic, Alan3354:
Answer by josgarithmetic(39620) About Me  (Show Source):
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
solve the equation
6^(x-1)-3=9
---------------
6^(x-1) = 12
(x-1)*log(6) = log(12)
x-1 = log(12)/log(6)
x = 1 + log(12)/log(6)
You can stop here, or
----------------
x = (log(6) + log(12))/log(6)
x = log(72)/log(6)
or,
x+=+log%286%2C72%29
--------
x =~ 2.387