Question 1100433
In the beginning, it was {{{S=3x+2x+x=6x}}}.
So then George's share is split up into fourths. 
One forth to Tony, three fourths to John.
So then Tony has,
{{{T=2x+(1/4)(3x)=2x+(3/4)x=(11/4)x}}}
and John has,
{{{J=x+(3/4)(3x)=x+(9/4)x=(13/4)x}}}
and
{{{J=T+100}}}
Substituting,
{{{(13/4)x=(11/4)x+100}}}
{{{(2/4)x=100}}}
{{{x=200}}}
Originally,
{{{S=6x}}}
{{{S=6(200)}}}
{{{S=1200}}}