Đáp án:
Giải thích các bước giải:
\[\begin{array}{l}
6 \cdot \left( {\frac{3}{7} - 2x} \right) = \frac{6}{5} \cdot 2x\\
\Leftrightarrow 6 \cdot \frac{3}{7} - 6 \cdot 2x = \frac{{12}}{5}x\\
\Leftrightarrow \frac{{18}}{7} - 12x = \frac{{12}}{5}x\\
\Leftrightarrow \frac{{18}}{7} = \frac{{12}}{5}x + 12x\\
\Leftrightarrow \left( {\frac{{12}}{5} + 12} \right)x = \frac{{18}}{7}\\
\Leftrightarrow \frac{{72}}{5}x = \frac{{18}}{7}\\
\Leftrightarrow x = \frac{{18}}{7}:\frac{{72}}{5}\\
\Leftrightarrow x = \frac{5}{{28}}
\end{array}\]
