$\"\"$ $\"\"$ $\"\"$

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The inequlaity is $\"\"$ .

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Apply addition property of inequality: Add 6 to each side.

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$\"\"$

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

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

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$\"\"$ (Add: 9 + 6 = 15) $\"\"$

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Apply multiplication property of inequality: Multiply each side by 4.

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$\"\"$

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$\"\"$ (Cancel common terms) \ \

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$\"\"$ (Multiply: $\"\"$ ) $\"\"$

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According to division property of inequality: If a > b then $\"\"$

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$\"\"$ (Divide each side by 3)

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$\"\"$ (Cancel common terms)

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

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$\"\"$ (Multiply each side by negative one and flip the symbol)

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

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Check:

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To substitute a number less than or equal to $\"\"$ in $\"\"$ .

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$\"\"$ (Substitute d = $\"\"$ )

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

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$\"\"$ (Multiply: $\"\"$ )

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

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$\"\"$ (Subtract: $\"\"$ )

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The inequality is true $\"\"$

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The inequality solution set is $\"\"$ .