Tìm x , biết: 6) trị tuyệt đối của (x − 2 /3) − 2 /5 = 1/3

6) \(\left| {x - \frac{2}{3}} \right| - \frac{2}{5} = \frac{1}{3}\)

\(\left| {x - \frac{2}{3}} \right| = \frac{1}{3} + \frac{2}{5}\)

\(\left| {x - \frac{2}{3}} \right| = \frac{{11}}{{15}}\)

Trường hợp 1: \(x - \frac{2}{3} = \frac{{11}}{{15}}\)

\(x = \frac{{11}}{{15}} + \frac{2}{3}\)

\(x = \frac{7}{5}\)

Trường hợp 2: \(x - \frac{2}{3} = \frac{{ - 11}}{{15}}\)

\(x = \frac{{ - 11}}{{15}} + \frac{2}{3}\)

\(x = \frac{{ - 1}}{{15}}\)

Vậy \(x \in \left\{ {\frac{7}{5};\,\,\frac{{ - 1}}{{15}}} \right\}.\)