ta có : \(\left(\frac{7}{6}+\frac{7}{2}\right):\left(\frac{-25}{6}.0,2\right)\) => \(\left(\frac{7}{6}+\frac{21}{6}\right):\left(\frac{-25}{6}.\frac{1}{5}\right)\) =>\(\frac{14}{3}:\frac{-5}{6}\) =>\(-\frac{28}{5}\)

B = \(-\frac{28}{5}\)