Question

2x-y=1 x+y=-4 систем уравнений

Answer 1

2x-y=1

X+y=-4

 

3x=-3

X=-1

 

Y=-3

Otvet:(-1,-3)

Answer 2

2х-$left { {{2x-y=1 } atop {x+y=-4}} right.$
2х-y+х+y=-3
3х=-3,х=-1
 y=-4-х=-4-(-1)=-3
х=-1; y=-3