Đáp án:
$\left[ \begin{array}{l}x=\dfrac{4}{4}=1\\x=\dfrac{2}{4}=\dfrac{1}{2}\end{array} \right.$
Giải thích các bước giải:
$2|x-\dfrac{3}{4}|-\dfrac{1}{2}=0$
$↔2|x-\dfrac{3}{4}|=\dfrac{1}{2}$
$↔|x-\dfrac{3}{4}|=\dfrac{1}{4}$
$↔\left[ \begin{array}{l}x-\dfrac{3}{4}=\dfrac{1}{4}\\x-\dfrac{3}{4}=-\dfrac{1}{4}\end{array} \right.$
$↔\left[ \begin{array}{l}x=\dfrac{4}{4}=1\\x=\dfrac{2}{4}=\dfrac{1}{2}\end{array} \right.$
Vậy $x=1$ hoặc $x=\dfrac{1}{2}$
