Answer :

luana
[tex] \left \{ {{3x-6y=-3\ \ |*2} \atop {2x+4y=30\ \ | *(-3)}} \right. \\\\ \left \{ {{6x-12y=-6} \atop {-6x-12y=-90}} \right. \\+----\\elimination\\\\ 0 \neq -69\\\\There\ are\ no\ solutions[/tex]