Question

Sendo a//b//c, calcule as incógnitas:​

Answer 1

Resposta:

letra a

$\frac{x}{3} = \frac{3}{4} \\ 4x = 9 \\ x = \frac{9}{4}$

letra b

$\frac{7}{24} = \frac{x}{x + 12} \\ 24x = 7(x + 12) \\ 24x = 7x + 84 \\ 24x - 7x = 84 \\ 17x = 84 \\ x = \frac{84}{17}$