First find the length of the segments AL and CL
AL = 3x + 3
CL = 14
CA = 3x + 3 +14
= 3x + 17
If CA and BD are the same then:
3x + 17 = 4x + 13
Then solve
-3x from both sides
x + 13 = 17
-13 from both sides
x = 4
Plug it in
3(4) + 17
12 + 17 = 29
