Question 994032
Let the number of quarters be Q and the number of dimes be D
{{{Q = 3D-2}}}

{{{1480 = 25Q + 10D)}}}
{{{1480 = 25(3D-2) + 10D}}}
{{{1480 = 75D-50 + 10D}}}
{{{1530 = 85D}}}
{{{18 = D}}}
That means we have {{{Q=(3*18) - 2}}}
{{{Q = 52}}}