Question 1153591
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you have $2.75 in quarters and dimes however your sister who has $6 as two times as many quarters and three times as many dimes how many total <s>points</s> COINS do the two of you have ?
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you:
{{{25q+10d=275}}}
{{{5q+2d=55}}}


sister:
{{{2*25*2q+10*3d=600}}}
{{{2*5*2q+2*3d=60}}}
{{{5*2q+3d=30}}}


You could solve the system for the number of coins "you" have, and from that find the total coins of each which you and sister have:
{{{system(5q+2d=55,10q+3d=60)}}}