Question

nas figuras a// b// c, calcule o valor de x

Answer 1

Não irei responder as questões (A, B) pois estão ilegiveis

Iremos usar o Teorema de Tales para resolver as questões

C) $\frac{x}{14} = \frac{9}{12}$

$12x = 14.9$

$12x= 126$

$x = \frac{126}{12}$

$x = 10,5$

D) $\frac{x}{12} = \frac{8}{9}$

$9x = 12.8$

$9x = 96$

$x = \frac{96}{9}$

$x = 10,66...$

E) $\frac{9}{x} = \frac{18}{4}$

$18x = 9.4$

$18x = 36$

$x = \frac{36}{18}$

$x = 2$

F)$\frac{10}{15} = \frac{3x + 1}{5x - 2}$

$10(5x - 2) = 15(3x + 1)$

Vamos fazer a distributiva

$50x - 20 = 45x + 15$

$50x - 45x = 15 + 20$

$5x = 35$

$x = \frac{35}{5}$

$x = 6$