Question

Realize os cálculos e complete cada quadro com o valor adequado.

Answer 1

Resposta:

$\frac{x}{6} = \frac{18}{21}$

$\frac{6}{x} = \frac{18}{21} = 18x = 126$

$x = \frac{126}{18} = 7$

Answer 2

a)

$18.x =6.21 \\ x = \frac{6.21}{18} \\ x = \frac{6.3.7}{6.3} \\ x = 7$

b)

$18.x = 12.19 \\ x = \frac{12.19}{18} \\ x = \frac{3.4.19}{3.2.3} \\ x = \frac{38}{3}$

c)

$0,2.x = 3.4 \\ x = \frac{3.4}{0,2} \\ x = \frac{3.20.0,2}{0,2} \\ x = 60$