\(\left|x-\dfrac{2}{7}\right|=\dfrac{3}{14}\)
\(\Rightarrow\left[{}\begin{matrix}x-\dfrac{2}{7}=\dfrac{3}{14}\\x-\dfrac{2}{7}=\dfrac{-3}{14}\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=\dfrac{1}{2}\\x=\dfrac{1}{14}\end{matrix}\right.\)
Vậy ...................
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Giải:
\(\left|x-\dfrac{2}{7}\right|=\dfrac{3}{14}\)
\(\Leftrightarrow\left[{}\begin{matrix}x-\dfrac{2}{7}=\dfrac{3}{14}\\x-\dfrac{2}{7}=-\dfrac{3}{14}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{14}+\dfrac{2}{7}\\x=-\dfrac{3}{14}+\dfrac{2}{7}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{2}\\x=\dfrac{1}{14}\end{matrix}\right.\)
Vậy \(x=\dfrac{1}{2}\) hoặc \(x=\dfrac{1}{14}\).
Chúc bạn học tốt!
