Question

Решите систему уравнений:
$\left \{ {{5x-2y=11} \atop {4x-y=4}} \right.$

Answer 1

$\left \{ {5x-2y=11} \atop {4x-y=4}} \right. \\ \\ \left \{ {{5x-2y=11} \atop {y=4x-4}} \right. \\ \\ 5x-2(4x-4)=11 \\ 5x-8x+8=11 \\ -3x=3 \\ x=-1 \\ \\ y=4*(-1)-4=-4-4=-8$

Ответ: $(-1;-8)$