Question 1055378
Write the equations for the description.


{{{system(y-x=20,y/7=x/3)}}}, but do you believe the proportion equation picked is the correct one?


{{{3y=7x}}}
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{{{y=20+x}}}
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{{{3(20+x)=7x}}}
{{{60+3x=7x}}}
{{{60=4x}}}
{{{highlight(x=15)}}}
re-using the equation formula for y,
{{{y=20+x}}}
{{{y=20+15}}}
{{{highlight(y=35)}}}