Question 877546
d = dollars per dog
c = dollars per cat

{{{d/c=2}}}.
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From the price per individual ratio, d=2c.


Using dog and cat count,
{{{24d+164c<=420}}}
{{{24*2c+164c<=420}}}
{{{48c+164c<=420}}}
{{{212c<=420}}}
{{{c<=1.98}}} dollars per cat, corresponding to about 3.96 dollars per dog.