Answer
x = 4
BD = 12
CB = 5x = 20
CD = 32
Explanation
We are told that point B lies on CD between C and D.
So, we can say that
CD = CB + BD
CB = 5x
BD = 3x
BD = 12
Since, BD = BD
3x = 12
Divide both sides by 3
(3x/3) = (12/3)
x = 4
CD = CB + BD
CD = 5x + 3x = 8x = 8 (4) = 32
Hope this Helps!!!
