Tìm x, biết: \(\left| {\dfr...

D

- Hướng dẫn giải

Ta có:

\(\left| {\dfrac{5}{{18}} - x} \right| + \dfrac{1}{5} = \dfrac{1}{2}\)

\(\begin{array}{l}\left| {\dfrac{5}{{18}} - x} \right| = \dfrac{1}{2} - \dfrac{1}{5}\\\left| {\dfrac{5}{{18}} - x} \right| = \dfrac{3}{{10}}\end{array}\)