Question 959136
{{{log(7,(y))=0}}}
{{{y=1}}}
{{{log(3,(z))=1}}}
{{{z=3}}}
{{{log(2,(x))=3}}}
{{{x=8}}}
So,
{{{x^(-1/2)=1/sqrt(8)=sqrt(8)/8=sqrt(2)/4}}}