Question

Qual a resolução desse problema ?

Answer 1

$\frac{2x + 1}{5x - 1} = \frac{4}{6}$
$12x + 6 = 20x - 4$
$8x = 10$
$x = \frac{10}{8}$
$x = \frac{5}{4}$
O segmento BC vale:

$5x - 1$
$5 \times \frac{5}{4 } - 1$
$\frac{25}{4} - 1$
$\frac{21}{4}$