Вопрос:

Ответ:

\[0,6 \cdot (4x - 14) - 0,4 \cdot (5x - 1) =\]

\[= 2,4x - 8,4 - 2x + 0,4 =\]

\[= 0,4x - 8;\]

\[x = 4\frac{1}{6}:\]

\[0,4x - 8 = \frac{4}{10} \cdot 4\frac{1}{6} - 8 =\]

\[= \frac{2}{5} \cdot \frac{25}{6} - 8 = \frac{5}{3} - 8^{\backslash 3} =\]

\[= \frac{5}{3} - \frac{24}{3} = - \frac{19}{3} = - 6\frac{1}{3}.\]