Question

(3x+2y=-2,
5x - y=14;
1
метод додавання
даю 20 балов

Answer 1

Ответ:

$\left\{\begin{array}{l}3x+2y=-2\\5x-y=14\ |\cdot 2\end{array}\right\ \oplus \ \left\{\begin{array}{l}13x=26\\y=5x-14\end{array}\right\ \ \left\{\begin{array}{l}x=2\\y=10-14\end{array}\right\ \ \left\{\begin{array}{l}x=2\\y=-4\end{array}\right\\\\\\Otvet:\ \ (2;-4)\ .$