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Ok I'm trying to revise modulus functions etc and this is supposed to be an 'easy' question but I came up with the wrong answer so now I'm getting confused.

I have to solve |x+2| - 1 <2

I used the formula: |x| < b <------> -b < x < b

And this is how I used it:

|x + 2| - 1<2

|x + 2|<3

-3< x + 2 <3

-1< x <5

Which is supposedly wrong because in the answer booklet it gives the solution: -5< x<1

AHH I'm so confused, sorry. I don't know if there's supposed to be another formula or something. My teacher taught us the squaring way but to be honest, in exams that just provides me with loads of working out to do which is tiring.

Thanks in advance to anyone who can help me on this!

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# Homework Help: Modulus question

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