[tex]Notam\ cu\ x\ salariul.[/tex]
[tex]I.\ x+ \frac{5}{100} x=x(1+ \frac{1}{20} )= \frac{21}{20}x \\
II.\ \frac{21}{20}x+\frac{5}{100}*\frac{21}{20}x = \frac{21}{20}x+ \frac{21}{400} x= \frac{441}{400}x [/tex]
[tex] \frac{441}{400} x=2205 \Rightarrow441x=882000 \Rightarrow x=2000[/tex]