So the 5 angles add up to 540
[tex]5y = 540[/tex]
Then you divide and get
[tex]y = 108[/tex]
Then you know that angles of a line adds up to 180
So the equation would be
[tex]108 + x = 180[/tex]
Then you solve
[tex]108 + x = 180 \\ - 108 \: \: \: - 108 \\ x = 72[/tex]
