Question 1107799
n, d, q
nickels dimes quarters


{{{system(n+d+q=47,n-q=12,25q-10d=370)}}}

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{{{n=q+12}}}

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{{{25q-370=10d}}}
{{{5q-74=2d}}}
{{{d=5q/2-37}}}

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{{{n+d+q=47}}}
{{{(q+12)+(5q/2-37)+q=47}}}
{{{2q+5q/2+12-37=47}}}
{{{2q+5q/2=47-12+37}}}
{{{2q+5q/2=72}}}
{{{4q+5q=144}}}
{{{9q=144}}}
{{{highlight(q=16)}}}
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{{{highlight(n=28)}}}
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{{{highlight(d=3)}}}