Question

Teorema de Tales
SOCORRO

Answer 1

Explicação passo-a-passo:

Pelo Teorema de Tales:

$\sf \dfrac{x}{x+3}=\dfrac{10}{15}$

$\sf 15x=10\cdot(x+3)$

$\sf 15x=10x+30$

$\sf 15x-10x=30$

$\sf 5x=30$

$\sf x=\dfrac{30}{5}$

$\sf \large\red{x=6}$

Letra B

Answer 2

• Usando o Teorema de Tales:

(x + 3 + x)/x = (10 + 15)/10

(2x + 3)/x = 25/10

(2x + 3)/x = 5/2

2(2x + 3) = 5x

4x + 6 = 5x

5x - 4x = 6

x = 6

Resposta: b) 6