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

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$\"\"$ (Apply Commutative property: $\"\"$ )

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$\"\"$

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$\"\"$ (Associative Property: $\"\"$ )

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$\"\"$ (Substitution Property: $\"\"$ )

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$\"\"$ (Substitution Property: $\"\"$ )

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$\"\"$

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The value of the expression is $\"\"$

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