$\"\"$

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The expression is $\"\"$ .

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Case 1: If a < b Then

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$\"\"$

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Case 2: If $\"\"$ a < b Then

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$\"\"$

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Multiply each side by negative one and flip the symbol.

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$\"\"$

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$\"\"$ (Product of two same signs is positive) $\"\"$

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Solve equation for case 1.

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$\"\"$

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Apply addition property of inequality: Add 3 to each side.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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Apply division property of inequality: Divide each side by 3.

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ ) $\"\"$

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Solve equation for case 2.

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$\"\"$

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Apply addition property of inequality: Add 3 to each side.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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Apply division property of inequality: Divide each side by 3.

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ ) $\"\"$

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Graph the solution set on a number line.

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$\"absolute$

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Note: A circle means that this point is not included in the solution set. $\"\"$

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The solution set is $\"\"$ .