Respuesta :

lina3hansen

Answer:

x = 20

Step-by-step explanation:

x^2 - 4x - 8 = 8

x^2 - 4x - 8 + 8 = 8 + 8

x^2 - 4x = 16

x (x - 4) = 16

x - 4 = 16

x - 4 + 4 = 16 + 4

x = 20