\[\frac{14b^{2} - c}{7b} - 2b^{\backslash 7b} =\]
\[= \frac{14b^{2} - c - 14b^{2}}{7b} = - \frac{c}{7b};\]
\[b = 0,5;\ \ c = - 14:\]
\[- \frac{- 14}{7 \cdot 0,5} = \frac{2}{0,5} = \frac{20}{5} = 4.\]