Question 1142511
20c coins?


x of 20c coins
y of 50c coins
{{{x+y=60}}}, sixty coins
{{{20x+50y=18.6}}}


{{{0.20(60-y)+0.50y=18.6}}}, easier to find y first.


{{{12-0.2y+0.5y=18.6}}}
{{{0.3y=18.6-12}}}
{{{0.3y=6.6}}}
{{{highlight(y=22)}}}------------------the 50c coins

{{{highlight(x=38)}}}-----------------the 20c coins