Question

решите систему уравнений
{2x-y=-1
{-4x+3y=-3

Answer 1

$left { {{2x-y=-1} atop {-4x+3y=-3}} right. \ left { {{2x+1=y} atop {-4x+3y=-3}} right. \ -4x+3(2x+1)=-3 \ -4x+6x+3=-3$
$2x=-6 \ x=-3 \ 2x-y=-1 \ -6-y=-1 \ -6+1=y \ y=-5$