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 -9<9x+9<27

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-9<9x+9<27

 Apr 7, 2016

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-9<9x+9<27

\(-9 < 9x + 9 < 27 \\ \\ -1 < x+1 < 3 \\ \\ -2 < x < 2\) 

 Apr 7, 2016

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