[Alloy]

@ Lich, you are 1/2 wrong. There are two possible answers for each question.

1. x=4 or/and x=0
2. x=0 or/and x= -4/3
3. x=3 or/and x=-3
4. x=1 or/and x=-2
5. x=6 or/and x=-6

This is so easy....