Question

Реши систему уравнений: {2x−y=12
{x−3y=3

Answer 1

$\left \{ {{2x-y=12} \atop {x-3y=3}|*(-2)} \right.\\\\+\left \{ {{2x-y=12} \atop {-2x+6y=-6}} \right.\\--------\\5y=6\\y=1,2\\x=3+3y=3+3*1,2=3+3,6=6,6\\x=6,6$

Ответ : (6,6 ; 1,2)