Question 1146172
Ages  s and f


{{{system(s-4=(1/2)(f-4),s+6=(3/5)(f+6))}}}


{{{2s-8=f-4}}}
{{{f=2s-8+4}}}
{{{f=2s-4}}}



subst into secnd eq
{{{5s+30=3f+18}}}
{{{5s-3f=18-30}}}
{{{5s-3(2s-4)=-12}}}
{{{5s-6s+12=-12}}}
{{{-s=-24}}}
{{{highlight(s=24)}}}








------


Is  "i" and "I" the same person?