Question 1098765
d dimes
and
20-d quarters


{{{10*d+25(20-d)=425}}}

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{{{2d+5(20-d)=85}}}
{{{2d+100-5d=85}}}
{{{-3d=85-100}}}
{{{3d=15}}}
{{{highlight(d=5)}}}--------Five dimes
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Should be {{{highlight(15)}}}----------fifteen quarters