Question 765551
{{{6/(1-x)=7/(1+x)}}}


{{{6(1+x)=7(1-x)}}}


{{{6+6x=7-7x}}}


{{{6+6x+7x=7}}}


{{{6x+7x=7-6}}}


{{{13x=1}}}


{{{x=1/13}}}