Question

Calcule o valor de x sabendo que BC//DE:

Answer 1

$\frac{AD}{AB} = \frac{AE}{AC}$

$\frac{6 + x}{6} = \frac{y + 2y}{y}$

$\frac{6 + x}{6} = \frac{y (1 + 2)}{y}$ - simplifique o y

6 + x = 3 * 6
x = 18 - 6
x = 12