Question 920385
Using log properties:
{{{xlog2=log15}}}
and 
{{{ylog15=log32}}}, which is
{{{log15=log32/y}}}  , then,
{{{xlog2=log32/y}}}  , now divide both sides by ' log2 ' and cross multiply 'y' with 'x'
=> {{{xy=log32/log2}}} , finally,
{{{xy=5}}}