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

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The inequlaity is $\"\"$ .

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Apply addition property of inequality: Add 7 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: 21 + 7 = 28) $\"\"$

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Apply division property of inequality: Divide each side by 4.

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$\"\"$

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$\"\"$ (Cancel common terms)

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

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Check:

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To substitute a number greater than or equal to 7 in $\"\"$ .

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$\"\"$ (Substitute a = 7)

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

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

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The inequality is true $\"\"$

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