Răspuns :
[tex]b - \frac{1}{5} = \frac{3}{5} [/tex]
[tex]b = \frac{3}{5} + \frac{1}{5} [/tex]
[tex]b = \frac{3 + 1}{5} [/tex]
[tex]b = \frac{4}{5} [/tex]
[tex]b=0.8[/tex]
[tex]b = \frac{3}{5} + \frac{1}{5} [/tex]
[tex]b = \frac{3 + 1}{5} [/tex]
[tex]b = \frac{4}{5} [/tex]
[tex]b=0.8[/tex]