Question

{2x+y+5=0 {3x+y=-2
Какой ответ?

Answer 1

$\left \{ {{2x+y+5=0} \atop {3x+y=-2}} \right.\\\\\left \{ {{2x+y=-5|*(-1)} \atop {3x+y=-2}} \right.\\\\+\left \{ {{-2x-y=5} \atop {3x+y=-2}} \right.$

_________

x = 3

y = - 2 - 3x = - 2 - 3 * 3 = - 2 - 9 = - 11

Ответ : (3 ; - 11)