Question 1060304
{{{S+T=27}}}
Seven years ago,
{{{T-7=3+(S-7)/4}}}
{{{4(T-7)=12+S-7}}}
{{{4T-28=5+S}}}
{{{4T=S+33}}}
From eq. 1,
{{{T=27-S}}}
Substituting,
{{{4(27-S)=S+33}}}
{{{108-4S=S+33}}}
{{{-5S=-75}}}
{{{S=15}}}
So then,
{{{15+T=27}}}
{{{T=12}}}