Respuesta :

devishri1977

Answer:

Step-by-step explanation:

ΔADE & ΔABC are similar triangles.

[tex]\frac{AD}{AB}=\frac{DE}{BC}\\\\\frac{12}{4}=\frac{12}{x}\\[/tex]

Cross multiply,

12*x = 12*4

[tex]x= \frac{12*4}{12}\\[/tex]

x = 4