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

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The inequlaity is $\"\"$ .

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Apply addition property of inequality: Add 5 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: 15 + 5 = 20) $\"\"$

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Apply subtraction property of inequality: Subtract 3b from each side.

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$\"\"$

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$\"\"$ (Apply commutative property of addition: $\"\"$ ) \ \

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

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

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

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According to division property of inequality: if a < b then $\"\"$ \ \ $\"\"$ (Divide each side by 5)

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$\"\"$ (Cancel common terms)

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

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$\"\"$

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$\"\"$

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Check:

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To substitute a number greater than or equal to 4 in $\"\"$ .

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$\"\"$ (Substitute b = 4)

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

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$\"\"$ (Add: 12 + 15 = 27)

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

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The inequality is true $\"\"$

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