Question

\(\left|2x:\dfrac{4}{5}-\dfrac{1,6}{4}\right|=0\)

Answer 1

\(\Leftrightarrow\left|\dfrac{5}{2}x-\dfrac{2}{5}\right|=0\) (1)

+ Nếu \(\dfrac{5}{2}x-\dfrac{2}{5}\ge0\Leftrightarrow x\ge\dfrac{4}{25}\)

\(\left(1\right)\Leftrightarrow\dfrac{5}{2}x-\dfrac{2}{5}=0\Leftrightarrow x=\dfrac{4}{25}\) Thảo mãn diều kiện

+ Nếu \(\dfrac{5}{2}x-\dfrac{2}{5}< 0\Leftrightarrow x< \dfrac{4}{25}\)

\(\left(1\right)\Leftrightarrow-\dfrac{5}{2}x+\dfrac{2}{5}=0\Leftrightarrow x=\dfrac{4}{25}\) (loại)

Answer 2

x = 4/25