Tìm x, biết: 2|x| +1/2=2

* Hướng dẫn giải

$\begin{array}{l}a)x\in \left\{\frac{-3}{4};\frac{3}{4}\right\}\\ \\ b)x\in \left\{\frac{2}{3};\frac{-5}{3}\right\};\\ \\ c)x\in \left\{\frac{-3}{4};\frac{5}{4}\right\}\\ \\ d)x\in \left\{\frac{23}{4};\frac{-17}{4}\right\}\end{array}$