Question 988424
{{{system(d+q=40,10d+25q=490)}}}


{{{system(d+q=40,2d+5q=98)}}}


{{{2(40-q)+5q=98}}}

{{{80-2q+5q=98}}}

{{{3q=98-80}}}

{{{3q=18}}}----------{{{highlight(q=6)}}}-----six quarters
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{{{highlight(d=34)}}}-----------thirty-four dimes