Question 1077521
p, Person
s, Sister
68, Grandfather



{{{system(s=p+8,p+s=68/2)}}}


{{{p+s=34}}}
{{{p+p+8=34}}}
{{{2p+8=34}}}
{{{p+4=17}}}
{{{highlight(p=13)}}}---------answer's the question.


{{{highlight(s=21)}}}