[tex]y = - x - 1[/tex]
[tex]y = - 5x - 13[/tex]
Multiply the lower equation by -1:
[tex]y = - x - 1[/tex]
[tex] - y = 5x + 13[/tex]
Add the systems:
[tex]0 = 4x + 12[/tex]
[tex]4x = - 12[/tex]
[tex]x = \frac{ - 12}{4} = - 3[/tex]
Substitute x=3 in any equation:
[tex]y = - x - 1[/tex]
[tex]y = - ( - 3) - 1[/tex]
[tex]y = 3 - 1 = 2[/tex]
SoLuTiOn PaiR:
( -3 , 2 )
