jawab menggunakan caranya, tolong jawab secepatnya yach terima kasih...

CE/EB = AD/DB
x/(x - 4) = 12 / 9
12 (x - 4) = 9x
12x - 48 = 9x
12x - 9x = 48
3x = 48
x = 48/3
x = 16

AB/DB = CB/EB

(12+ 9)/9 = (x+ x-4)/(x -4)

21/9= (2x-4)/(x-4)

21(x-4)= 9 (2x-4)

21x -84 =18x -36

21x-18x=84 - 36

3x = 48

x =48/3

x =16

Panjang CE = x =16 cm