Question 414177
{{{t=(rs)/(q(s-1))}}}

{{{2.5=(6s)/(3(s-1))}}}
{{{7.5(s-1)=6s}}}
{{{15(s-1)=12s}}}
{{{15s-15=12s}}}
{{{3s=15}}}
{{{highlight(s=5)}}}