Question

Решите систему уравнений :
{x+2y=11,
5x-3y=3

Answer 1

$left { {{x+2y=11} atop {5x-3y=3}} right. left { {{-5x-10y=-55} atop {5x-3y=3}} right. |+ left { {{x+2y=11} atop {-13y=-52}} right. left { {{x+8=11} atop {y=4}} right. left { {{x=3} atop {y=4}} right.$
Ответ: $(3;4)$