Question

Реши систему уравнений: {2x−y=17
x−3y=3

{x=
y=

Answer 1

$\left \{ {{2x-y=17} \atop {x-3y=3|*(-2)}} \right. \\\\+\left \{ {{2x-y=17} \atop {-2x+6y=-6}} \right. \\5y=11\\y=2,2\\\left \{ {{y=2,2} \atop {2x-y=17}} \right.\\\\\left \{ {{y=2,2} \atop {2x-2,2=17}} \right.\\\\\left \{ {{y=2,2} \atop {2x=19,2} \right. \\\\\left \{ {{y=2,2} \atop {x=9,6}} \right.$

Ответ: (9,6; 2,2)