[tex]\text{Notez numerele cu a si b:}\\
\frac{a}{3}=\frac{b}{7}\Rightarrow a=\frac{3}{7}\cdot b\\
b-a=108\\
b-\frac{3}{7}\cdot b=108 |\cdot 7\\
7b-3b=756\\
4b=756\Rightarrow \boxed{b=189}\\
a=\frac{3}{7}\cdot b\\
\\
a=\frac{3}{7}\cdot 189\Rightarrow \boxed{a=81}\\
\text{R:Numerele cautate sunt 81 si 189}[/tex]
