Răspuns:
0,09= 9/100
[tex] \frac{n - \frac{9}{100} }{9} = 2 \\ \\ n - \frac{9}{100} = 18 \\ \\ 100n - 9 = 18 \times 100 \\ \\ 100n = 1800 + 9 \\ \\ n = 1809 \div 100 \\ \\ n = 18.09[/tex]
