SOLUTION: hi im stuck on logs the question ive got is {{{5^(3x-1)=87}}} we're allowed to use calculators and ive tried the log(5x87) but i think i need the method for this one to work out ot

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Question 399372: hi im stuck on logs the question ive got is we're allowed to use calculators and ive tried the log(5x87) but i think i need the method for this one to work out others. hope you can help
Found 2 solutions by richard1234, ewatrrr:
Answer by richard1234(7193)   (Show Source): You can put this solution on YOUR website!
Taking log of both sides,





= 1.25827...
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!


Hi





 (3x-1)ln5 = ln87

    3x = ln87/ln5 + 1

     x = (ln87/ln5 + 1)/3 = 1.2583 

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