Question 185286
Let d be the dimes and n be the nickels
Given {{{d = 2n}}}
{{{10d + 5n = 250}}}
{{{10*2n + 5n = 250}}}
{{{25n = 250}}}
{{{n = 10}}}
{{{d = 2*10}}} = {{{20}}}

Does 20 dimes and 10 nickels result in $2.50??