Respuesta :

devishri1977

Answer:

Step-by-step explanation:

ΔABC & ΔADE 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=12*\frac{4}{12}\\[/tex]

x = 1 * 4

x = 4