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)