I think you forgot to put the question but it's okay, I found the full question:
4x - 12:
Factor out the greatest common factor, which is 4 in this case.
This gives you the answer of 4(x - 3)
1/4x + 3/4 :
Again, find the greatest common factor, which is 1/4 in this case
This gives you the answer of 1/4(x + 3)
0.3x - 1.5:
Find the greatest common factor, which is 0.3 in this case
This gives you the answer of 0.3(x - 5)
Hope this helps you (: <3