Answer: [tex]x - y = 4[/tex]
Step-by-step explanation:
[tex]x - 1 = 0[/tex]
Add 1 to both sides of the equation , that is
[tex]x - 1 + 1 = 0 + 1[/tex]
[tex]x = 1[/tex]
Also
[tex]y + 3 = 0[/tex]
subtract 3 from both sides of the equation , that is
[tex]y + 3 - 3 = 0 - 3[/tex]
[tex]y = -3[/tex]
Therefore :
[tex]x - y = 1 - (-3)[/tex]
[tex]x - y = 1 + 3[/tex]
[tex]x - y = 4[/tex]
