Solve for a: 1/9*|5a + 2| < 1. Express your answer in interval notation.
1/9*|5a + 2| < 1
|5a + 2| < 9
-9 < 5a + 2 < 9
-11 < 5a < 7
-11/5 < a < 7/5
a = (-11/5, 7/5)
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