Question

1)
Nas figuras, a // b // c, calcule o valor de x.

Answer 1

Resposta:

Explicação passo-a-passo:

$a) \frac{4}{12}= \frac{x}{21} => 12x = 4 . 21 => 12x = 84 => x =\frac{84}{12} => x = 7$

$b) \frac{2}{4}= \frac{3}{3} => 2x = 3 . 4 => 2x = 12 => x =\frac{12}{2} => x = 6$

$c) \frac{x}{14}= \frac{9}{12} => 12x = 9 . 14 => 12x = 126 => x =\frac{126}{12} => x = 10,5$