Question

B is the midpoint of segment AC; AB = 8v, and AC = 2v + 42. What is BC?

Answer 1

2 * AB = AC  
2 * 8v = 2v + 42
16v - 2v = 42
14v = 42
v = 42/14
v = 3

BC = AB = 8v = 8*3 = 24

Answer 2

I believe it's 24 after solving.