Question

Решите систему уравнений


Решите систему уравнений
2х + у = 1
х - 2у = 8

Answer 1

$left { {{2x+y=1} atop {x-2y=8}} right. \ left { {{4x+2y=2} atop {x-2y=8}} right. \ left { {{5x=10} atop {x-2y=8}} right. \ left { {{x=2} atop {y=-3}} right.$