Question 968836
{{{system(3x-6y=12,2x+6x=-12)}}}


{{{(3x-6y)+(2x+6y)=12-12}}}
{{{5x=0}}}
{{{x=0}}}


System is also equivalent to
{{{system(x-2y=4,x+3y=-6)}}}


{{{(x+3y)-(x-2y)=-6-(4)}}}
{{{5y=-2}}}
{{{y=-2/5}}}