To generalize, for all inequalities with a < 0 and b > 0:

a < x < b

We can convert to

**|x - (b+a)/2| < (b-a)/2, when |a| <= |b| **

and

**|x + (b+a)/2| < (b-a)/2, when |a| > |b|**

To generalize, for all inequalities with a < 0 and b > 0:

a < x < b

We can convert to

**|x - (b+a)/2| < (b-a)/2, when |a| <= |b| **

and

**|x + (b+a)/2| < (b-a)/2, when |a| > |b|**

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