Question

2x + y = -10
x - 3y = -4

Answer 1

Respuesta:

(x,y) = (-34, -2)

          (-7  ,  -7)

Explicación paso a paso

Answer 2

Respuesta:

$S=\{(-\frac{34}{7},\frac{2}{7}} )\}$

Explicación paso a paso:

$\left \{ {{2x+y=-10} \atop {x-3y=-4}} \right.\\\\\left \{ {{6x+3y=-30} \atop {x-3y=-4}} \right. \\\\7x=-34\\\\x=-\frac{34}{7} \\\\2(-\frac{34}{7})+y=-10 \\\\-\frac{68}7} +y=-10\\\\-68+7y=-70\\\\7y=-70+68\\\\7y=-2\\\\y=-\frac{2}{7}$