Résoudre le système : {x+5y=2 et 2x-y=4

[tex] \left \{ {{x+5y=2} \atop {2x-y=4} \ \ \ |5} \right. \\\\ \left \{ {{x+5y=2} \atop {10x-5y=20}} \right. \\======= \\\\ 11x \ \ / \ \ =22 \ \ \ |:11 \\\\ \boxed{x=2} \\\\ x+5y=2 \\\\ 5y=2-x \\\\ 5y=2-2 \\\\ 5y=0 \\\\ \boxed{y=0}[/tex]