|x -3| = |2x -3|
|x -3| = x -3 for x-3 >= 0 ---> x >= 3
|x -3| = -(x -3) for x-3 x = 0 ----> x >=3/2
|2x -3 | = -(2x -3) for 2x -3 x =3 ==> x - 3 = 2x -3 ====> x = 0 ; discard
2) 3/2 -(x-3) = 2x -3 ====> -x + 3 = 2x -3 ===> x =2 ( accepted solution )
3) x -(x-3) = -(2x -3) ====> x = 3