tentukan nilai p tersebut tolong ya...

Segitiga besar = Segitiga kecil
[tex] \frac{3 + 9}{12p} = \frac{9}{12} [/tex]

[tex] \frac{12}{12p} = \frac{9}{12} [/tex]

kali silang 12×12 dan 9×12p

144 = 9 (12 + p)
144 = 108 + 9p
144 - 108 = 9p
36 = 9p
39÷9 = p
4 = p
jadi p = 4