Question

teorema de tales

Ajudem, please!!​

Answer 1

Resposta:

$a) \: \: \frac{30}{3x} \times \frac{10}{5} = 10 \times = 150$

$x = \frac{150}{10} = 15$

$x = 15$

$b) \: \: \frac{x - 6}{ x + 20} \times \frac{4}{2} = 4(x - 6) \: \: 2(x + 20)$

$4x - 24 = 2x + 40$

$4x - 2x = 24 + 40$

$2x = 64$

$x = \frac{64}{2} = 32$

$x = 32$

$<strong>C</strong><strong>)</strong> \frac{x}{2} \times \frac{4}{x + 2} = x(x + 2) = 2 \times 4$

$x {}^{2} + 2x = 8$

$2x {}^{2} = 8$

$x {}^{2} = \frac{8}{2} = 4$

$x = \sqrt{4} = 2$

$x = 2$