Question 1093496
{{{system(n/q=3,d/n=1/2,5n+10d+25q=330)}}}


First two equations as formulas in terms of n and simplify the cents equation:
{{{system(q=n/3,d=n/2,n+2d+5q=66)}}}


Substitute into cents equation for d and q:
{{{n+2(n/2)+5(n/3)=66}}}
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{{{highlight_green(n=18)}}}------and with this you can find the others.