Question 493072
Use the formula
{{{ log( a*b ) = log(a) + log(b) }}} ( in reverse  )
{{{ log(3,2x) + log(3,7) = log(3,28) }}}
{{{ log(3,2x*7) = log(3,28) }}}
If the logs are equal, the numbers are equal
( the base could be anything you want )
{{{ 14x = 28 }}}
{{{ x = 2 }}}