Question 1113126
j, Jake
f, Father
{{{system(f=(5/2)j,f+j=77)}}}

-

{{{2f=5j}}}
{{{2(77-j)=5j}}}
{{{2*77-2j=5j}}}
{{{7j=2*77}}}
{{{highlight(j=22)}}}
-
{{{highlight(f=55)}}}