Question

Nas figuras, a // b // c, calcule o valor de xey. Obs: Faça a regra de três.​

Answer 1

Resposta:

$\sf \dfrac{x}{14} = \dfrac{9}{12}$

$\sf 12x = 9 \times 14 \\12x = 126\\\\x = \dfrac{126}{12} \\\\x = 10,5$

$\sf \dfrac{4}{10} = \dfrac{2}{x}$

$\sf 4x = 2 \times 10\\4x= 20\\\\x = \dfrac{20}{4} \\\\ \boxed {\sf x = 5 }$

$\sf \dfrac{10}{12} = \dfrac{x}{y}$

$\sf \dfrac{10}{12} = \dfrac{5}{y}$

$\sf 10y = 5 \times 12 \\10y = 60\\\\ y = \dfrac{60}{12} \\\\ \sf \framebox {\sf y = 5 }$

Explicação passo-a-passo: