Step-by-step explanation:
[tex]2x + y = 4[/tex]
Let's subtitute [tex]x = 1[/tex] for the above equation:
[tex]2(1) + y = 4[/tex]
[tex]2 + y = 4[/tex]
[tex]y = 2[/tex]
It's y = 2, refer to answer above
