Question

1 ? 1 supra 3 egal 12 supra cat
- = -
3 12

Answer 1

$\frac{1}{3} = \frac{12}{x}$
Inmultesti incrucisat (mezii si extremii opusi parca se numeau :) )
$\frac{1}{3} = \frac{12}{x} \\ 1 \times x = 3 \times 12 \\ x = 36 \\ = > \frac{1}{3} = \frac{12}{36}$

Answer 2

ai in imagine.........