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

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The expression is $\"\"$ .

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

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Apply division property of equality: if $\"\"$

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$\"\"$ (Divide each side by 9) \ \

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

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