Respuesta :

Answer:

C. 12

Step-by-step explanation:

[tex]4x=2x+6[/tex]

[tex]4x-2x=6[/tex]

[tex]2x=6[/tex]

[tex]x=3[/tex]

~

[tex]AB=4x\\=4(3)\\=12[/tex]

~

Therefore, your answer is C) 12 !!!!!!