Respuesta:
[tex]S=\{(-\frac{34}{7},\frac{2}{7}} )\}[/tex]
Explicación paso a paso:
[tex]\left \{ {{2x+y=-10} \atop {x-3y=-4}} \right.\\\\\left \{ {{6x+3y=-30} \atop {x-3y=-4}} \right. \\\\7x=-34\\\\x=-\frac{34}{7} \\\\2(-\frac{34}{7})+y=-10 \\\\-\frac{68}7} +y=-10\\\\-68+7y=-70\\\\7y=-70+68\\\\7y=-2\\\\y=-\frac{2}{7}[/tex]
