Tìm x:27/10-(2x -9/5)=-3/5

Lời giải:

\[\frac{{27}}{{10}} - \left( {2x - \frac{9}{5}} \right) =  - \frac{3}{5}\]

\[2x - \frac{9}{5} = \frac{{27}}{{10}} + \frac{3}{5}\]

\[2x - \frac{9}{5} = \frac{{33}}{{10}}\]

\[2x = \frac{{33}}{{10}} + \frac{9}{5}\]

\[2x = \frac{{51}}{{10}}\]

\[x = \frac{{51}}{{10}}:2\]

\[x = \frac{{51}}{{20}}\]

Vậy \[x = \frac{{51}}{{20}}.\]