Răspuns:
Deci....
[tex] \frac{( \frac{1}{2}) \div 3 }{7} = [/tex]
[tex] \frac{( \frac{ - 1}{2}) \times \frac{1}{3} }{7} = [/tex]
[tex] \frac{ \frac{ - 1}{6} }{7} = [/tex]
[tex] - \frac{1}{42} [/tex]
Succes....
