Question

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

Answer 1

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