Răspuns :
[tex]5 \: sticle \: ..... \: 12 \: lei \\ 7 \: sticle \: ..... \: x \: lei[/tex]
[tex]x = \frac{7 \times 12}{5} = \frac{84}{5} = 16.8 \: lei[/tex]
[tex]x = \frac{7 \times 12}{5} = \frac{84}{5} = 16.8 \: lei[/tex]
regula de trei simpla
5...............12
7.................x
x=(7*12)5=84/5=16,8 lei
5...............12
7.................x
x=(7*12)5=84/5=16,8 lei