Question

1) Nas figuras, a/b/c calcule o valor de X :

Answer 1

a)

$\frac{2}{4} = \frac{3}{x}$

2x=3.4

x=12/2

x=6

b)

$\frac{4}{12} = \frac{x}{21}$

12x=21.4

x=84/12

x=7

c)

$\frac{x}{14} = \frac{9}{12}$

12x=14.9

x=126/12

x=10,5

d)

$\frac{x}{12} = \frac{8}{9}$

9x=12.8

x=96/12

x=8