Tìm x

TÌM X, BIẾT :
$a) 2x - |x+1|=\frac{-1}{2}$
$$\begin{gathered} b) |x-1|\le 3\frac{1}{4} \\ c) |2x-1| > \left|\frac{-3}{4}\right| \\ d) |4x-1| - |3x-\frac{1}{2}|=0 \end{gathered}$$