Question

Вычислите координаты точек пересечения прямых: x+3y=-12 и 4x-6y=-12.

Answer 1

$left { {{x+3y=-12} atop {4x-6y=-12}} right. \ +left { {{2x+6y=-24} atop {4x-6y=-12}} right. \ left { {{6x=-36} atop {x+3y=-12}} right. \ left { {{x=-6} atop {-6+3y=-12}} right. \ left { {{x=-6} atop {y=-2}} right. \ \ OTBET:(-6;-2)$