Question

Calcule o valor de x : (Teorema de Tales)

Answer 1

Bom:

13x=10x+20
13x-10x=20
3x=20
x=20/3
x=6,66... Aproximadamente

Answer 2

$\frac{x}{x+2} = \frac{10}{13} \\ \\ 13x = 10*(x+2) => 13x = 10x + 20 \\ \\ 13x - 10x = 20 \\ \\ 3x = 20 \\ \\ x= \frac{20}{3} x = 6,66$

então x = 6,66..

x + 2 =   6,66 + 2 = 8,66