Question 248373
Let {{{d}}} = number of dimes he has
Let {{{n}}} = number of nickels he has
given:
{{{d + n = 15}}}
{{{d = (1/3)*15}}}
{{{d = 5}}}
{{{5 + n = 15}}}
{{{n = 10}}}
He has 5 dimes and 10 nickels
{{{10d + 5n}}} = total
{{{5*10  + 10*5 = 100}}}
He has 100 cents, or $1