Step-by-step explanation:
Substitute x = 12 and y = 4 into the equations:
1.
[tex]12 + 4 = 12[/tex]
Incorrect.
2.
[tex]12 + 4 = 4[/tex]
Incorrect.
3.
[tex]12 - 4 = 12[/tex]
Incorrect.
4.
[tex]12 - 4 = 4[/tex]
Incorrect.
All equations are incorrect when x and y are substituted.
