Question

Determine o valor de x em cada caso

$\frac{2x}{4} = \frac{7}{14} \: e \: \frac{8}{4} = \frac{x}{20}$

Answer 1

a) 2x/4 = 7/14
2x = 4 * 7/14
2x = 28/14
2x = 2
x = 1

b) 8/4 = x/20
x/20 = 8/4
x = 20 * 8/4
x = 160/4
x = 40