Question

(20 PNTS) A,B,C,D son puntos colineales y consecutivos, AC+BD=24 y BC=3/5(AD). Calcula AD

Answer 1

 I----------------------I---------------------I----------------------I
A            a           B           b           C            c           D

a + b + b + c = 24
a + b + c = 24 - b

b = 3x/5
5b = 3x
5b = 3(a + b + c)
5b = 3(24 - b)
5b = 72 - 3b
8b = 72
b = 9

a + b + c = x = 24 - b = 24 - 9 = 15