-2 < 3x +1 < 13
first subtract -1 from both sides...
-3 < 3x < 12
then divide both sides by 3....
-1 < x < 4
So x is greater than negative one, and less than 4.
I wish it was all like that. Sadly piecewise functions are not that easy.
Thanks for the kind words knapp. I'm not going to beat myself up over this class, if I have to take it again, I'll take it again. That's life.