Answer
x=(-∞,-18] U [12,∞)
Work Step by Step
Split into two equations
1/3x+1>5, 1/3x+1≥0
-(1/3x+1)>5, 1/3x+1<0
Solve for x
x>12, x≥-3
x<18, x≤-3
Find the Union
x=[12, ∞), x=(-∞, -18]
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