Answer:
[tex]x-12[/tex]
Step-by-step explanation:
First open the brackets
[tex]=(4x-6)-(3x+6)\\\\\\=4x-6-3x-6[/tex]
Then collect the like terms
[tex]4x-3x-6-6[/tex]
Solve the like terms
[tex]4x-3x=x\\\\\\-6-6=-12\\\\\\=x-12[/tex]
The simplified form is
[tex]x-12[/tex]