What is the answer to factorise 3d+12

Well it should be like this tell me if im wrong, ↓

  3D + 12
  ___   ___

   3        3

so, hypo thinking once 3 is divided should leave you with . ↓

D = 4 cause once you do all the cancellations it basically leads 2 D then you have to divide →→ 12/3 → 3·4 or 4·3 either way it equals 12 sooo just do the math and you will come up with ↓

-Hope this helped you any if not so comment  right answer D=4 :)

Ab=dc ac=de ad=bce i hope this !