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

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The equation is $\"\"$ .

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$\"\"$ (Distributive property: $\"\"$ )

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

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$\"\"$ (Product of two same signs is positive)

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

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The solution of expression $\"\"$ $\"\"$ .