Question 1086609
x, Leo
y, Louie


{{{system(x=3y,x-3=4(y-3))}}}

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{{{3y-3=4(y-3)}}}
{{{3y-3=4y-12}}}
{{{-3+12=y}}}
{{{system(y=9,x=27,highlight(x+y=30))}}}