Tuesday, July 16, 2013

2|x+1/3|<9 
means 
-9 < 2(x+1/3) < 9 

-9/2 < x+1/3 < 9/2 

-9/2-1/3 < x < 9/2 - 1/3 
-4 5/6 < x < 4 1/6 

Interval:
(-4 5/6, 4 1/6) 
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