Respuesta :

Answer:

x = 9

Step-by-step explanation:

Since B is the midpoint, that means segment AB has to be the same length as BC.

Therefore:

[tex]2(3x-1)=8x-20[/tex]

[tex]6x-2=8x-20[/tex]

[tex]18=2x[/tex]

[tex]9=x[/tex]