Answer:
[tex]\large\boxed{5x - 4, 7x - 4}[/tex]
Step-by-step explanation:
7x - 4
This expression cannot be simplified. You cannot subtract a known number from a variable.
6x - 4 - x
This equation can be simplified
Subtract 6x - x
[tex]\large\boxed{5x - 4, 7x - 4}[/tex]
Hope this helps :)