burgerandcheese
Junior Member
- Joined
- Jul 2, 2018
- Messages
- 85
If | x | = a means x = ±a
I know the given solution to | x - 2 | = | 2x - 1 | is x - 2 = ± (2x - 1) or 2x - 1 = ±(x - 2). But I don't understand. We don't know if x - 2 or 2x - 1 is either positive or negative, how come we can solve it like that?
I know the given solution to | x - 2 | = | 2x - 1 | is x - 2 = ± (2x - 1) or 2x - 1 = ±(x - 2). But I don't understand. We don't know if x - 2 or 2x - 1 is either positive or negative, how come we can solve it like that?