Question

calcule o valor 8/12=x/3

Answer 1

multiplicando cruzado fica:

12x = 8 . 3
x = 24/12
x = 2

Answer 2

$\frac{8}{12}= \frac{x}{3} \\ \\ 12x=24 \\ \\ x= \frac{24}{12} \\ \\ x=2$