Answer:
11
Step-by-step explanation:
AB and BC are equal. I mid point divides a segment into 2 equal pieces.
5x - 9 = 3x - 1 Subtract 3x from both sides
5x - 3x - 9 = 3x - 3x - 1 Combine
2x - 9 = - 1 Add 9 to both sides
2x - 9 + 9 = - 1 + 9 Combine
2x = 8 Divide by 2
2x/2 = 8/2
x = 4
AB length
5x - 9 = 5*4 - 9 = 20 - 9 = 11
AB = 11
