Bantu ya besok dikumpulkan

karena segitiga CDE sebangun dengan CAB

CD/AC = CE/CB = 9/(9+3) = 9/12 = 3/4

CE/CB = 3/4 = 12/(12+p)

3 x (12+p) = 4 x 12
36 + 3p = 48
3p = 48-36
    = 12

p = 12/3 = 4