Question

Решить систему неравенств:
5х-4у=13
2х-у=4

Answer 1

$left { {{5x-4y=13} atop {-y=4-2x}} right.$
$left { {{5x-4(2x-4)=13} atop {y=2x-4}} right.$
$left { {{5x-8x+16=13} atop {y=2x-4}} right.$
$left { {{-3x=-3} atop {y=2x-4}} right.$
$left { {{x=1} atop {y=-2}} right.$