First you had to rewrite as the problem.
Rewrite [tex]4*3=12[/tex]
[tex]4x-4*3[/tex]
Then you had to used their factor out by the common term of four.
[tex]=4(x-3)[/tex]
Final answer: [tex]\boxed{=4(x-3)}[/tex]
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie