Question 37121
ignoreing the words base2 for sake of clarity:


{{{ 3log(5x)= 12 }}}
{{{ log(5x)= 4 }}}


So, to reverse log-base2 we need to raise both sides as follows:
{{{ 2^(log(5x)) = 2^4 }}}
{{{ 5x = 16 }}}
{{{ x = 16/5 }}}


jon.