Question 889208
{{{(1/a)+(1/b)=8 }}}
{{{(1/b)=8-1/a  }}}
{{{1/b=8(a/a)-1/a}}}
{{{1/b=(8a-1)/a}}}
{{{highlight(b=a/(8a-1))}}} 
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{{{M=sqrt(4st)}}}
{{{M^2=4st}}}
{{{highlight(t=M^2/(4s))}}}