9) FIND KJ, 10) FIND DE

Points A, B, and C are collinear. Point B is between A and C. Find the length indicated.
11) AB= x + 1, AC = 14, and BC = 4x - 2.
Find BC.
12) Find BC if BC=2x-5, AC = 19,
and AB = 2x - 8.
13) AB=x+15, AC = 12, and BC = 2x + 15.
Find BC.
15) AC=7, AB = x - 5, and BC = -10 + x.
Find AB.
17) Find AB if AB=2x-4, AC= 3x + 2,
and BC = 10.
14) Find AC if AC = 16+ x, AB = 2x +18,
and BC = 6.
16) Find AC if AC = 2x+8, BC = 8,
and AB = 3x - 5.
18) BC=x, AC=16, and AB = x-4.
Find AB.