$\"\"$

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The equation is $\"\"$ .

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

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

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

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$\"\"$ (Additive inverse property: $\"\"$ )

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$\"\"$ (Addition identity property: $\"\"$ ) $\"\"$

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The value of $\"\"$ .

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