Question 850207
I will use log to mean log base 10.<P>
Use the following facts:  log x - log y = log x/y and {{{10^(logy)}}} = y<P>
log 18/3x = log 2<P>
{{{10^log(18/3x) = 10^log2}}}<P>
18/3x = 2<P>
6x = 18<P>
x=3