Question 366319
{{{50f + 20t = 400}}}
{{{5f + 2t = 40}}}
{{{f < 8}}} since if {{{f = 8}}}, there are no $20 chips
Suppose {{{f = 7}}}
{{{35 + 2t = 40}}}
{{{2t = 5}}} -can't have 1/2 a chip
-----------
Suppose {{{f = 6}}}
{{{30 + 2t = 40}}}
{{{2t = 10}}}
{{{t = 5}}}
------------
Suppose {{{f = 4}}}
{{{20 + 2t = 40}}}
{{{2t = 20}}}
{{{t = 10}}}
------------
Suppose {{{f = 2}}}
{{{10 + 2t = 40}}}
{{{2t = 30}}}
{{{t = 15}}}