Question 1109647
{{{25q+10d+5n=175}}}
{{{5q+2d+n=35}}}


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{{{system(d-q=2,n/d=2)}}}
{{{-q=2-d}}}
{{{q=d-2}}}
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{{{n=2d}}}



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Single equation in variable d,
{{{highlight_green(5(d-2)+2d+(2d)=35)}}}
Simplify and solve this and then use for evaluating n and q.