Question

calcule o valor de X

Answer 1

teorema de tales
CD/CA = CE/CB
4/12 = X/24
12x = 4*24
12x = 96
x = 96/12
x = 8

Para conferir a resposta descubra o lado EB irei chamá-lo de Y

CD/DA = CE/EB
4/8 = 8/y
4y = 64
y = 64/4
y = 16

CB = X + Y
CB = 8 + 16
CB = 24