Răspuns :
[tex]6 \: carti \: ..... \: 72 \: lei \\ 2 \: carti \: ..... \: x \: lei[/tex]
[tex]x = \frac{72 \times 2}{6} = \frac{72}{3} = 24 \: lei[/tex]
[tex]x = \frac{72 \times 2}{6} = \frac{72}{3} = 24 \: lei[/tex]