Question 1067348
The coins must contain maybe, four pennies.


{{{system(4+n+d+q=9,4+5n+10d+25q=84)}}}


{{{system(n+d+q=5,5n+10d+25q=80)}}}


Trying to eliminate n,
{{{system(5n+5d+5q=25,5n+10d+25q=80)}}}


{{{5d+20q=55}}}


{{{d+4q=11}}}----------Can you find whole number values for this equation and will one of the combinations work?
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{{{4q=-d+11}}}
{{{q=-d/4+11/4}}}
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{{{graph(300,300,-2,8,-4,4,-x/4+11/4)}}}
7 and 1? --------(Not this one; it will not work.)
3 and 2?
Nickels and Quarters?