[tex] - 2x + 4y = 4[/tex]
[tex]2x + 8y = 8[/tex]
Add the systems together:
[tex]2x - 2x + 4y + 8y = 4 + 8[/tex]
[tex]12y = 12[/tex]
[tex]y = 1[/tex]
Substitute y=1 in any equation:
[tex]2x + 8(1) = 8[/tex]
[tex]2x + 8 \: = 8[/tex]
[tex]2x = 0[/tex]
[tex]x = 0[/tex]
Define point A as the intersection between the two lines:
[tex]a(0. \: .1)[/tex]
