|2x-3|=2x-3

* Hướng dẫn giải

$\begin{array}{l}\left|2x-3\right|=2x-3\left(12\right)\\ +)x\ge \frac{3}{2}\Rightarrow \left(12\right)\iff 2x-3=2x-3\iff x\in R/x\ge \frac{3}{2}\\ +)x<\frac{3}{2}\Rightarrow \left(12\right)\iff 3-2x=2x-3\iff x=\frac{3}{2}(ktm)S=\left\{x/x\ge \frac{3}{2}\right\}\end{array}$