Question 130719
{{{3 log x = log 125}}}
Basic Properties of Logs
{{{n log(x)}}}= {{{log((x^n))}}}.

so 

{{{log ((x^3))}}}= {{{log ((5 ^3))}}}

take antilog to cancel the log
we get

{{{x ^3 = 5 ^3}}}
x = 5