Subtracting the first equation from the second one we get:
[tex]2x+y-x-y=4-5.[/tex]Adding like terms we get:
[tex]x=-1.[/tex]Substituting x=-1 in the first equation we get:
[tex]-1+y=5.[/tex]Adding 1 to the above equation we get:
[tex]\begin{gathered} -1+y+1=-5+1, \\ y=6. \end{gathered}[/tex]Answer:
[tex]x=-1\text{ and y=6.}[/tex]