Answer:
x=3 and AB=20
Step-by-step explanation:
If CB and BD are equal segments then you can solve for x by solving for
3x+6=8x-9
3x+15=8x (Add 9 to both sides)
15=5x (Subtract 3x from both sides)
x=3 (Divide 5 by both sides)
To find AB, substitute 3 and x
7(3)-1
21-1
20
