Salut!
[tex] 3 \times a + b = 7 | \times 2 \: (inmultim \: \: relatia \: \: cu \: \: 2[/tex]
[tex]5 \times b + 2 \times c = 16 | \times 2 \: (inmultim \: \: relatia \: \: cu \: \: 2)[/tex]
[tex]6 \times a + 12 \times b + 4 \times c = 7 \times 2 + 16 \times 2[/tex]
[tex] = > 14 + 32 \\ = > 46 - > numarul \: \: cautat[/tex]
Succes!
