$\"\"$

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

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The equation is $\"\"$ .

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Apply addition proparty of equality: Add 3 to each side.

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$\"\"$

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$\"\"$ (Apply Additive inverse proparty: $\"\"$ )

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$\"\"$ (Apply Additive identity proparty: $\"\"$ ) $\"\"$

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Apply multiplication proparty of equality: Multiply each side by 2.

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$\"\"$

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$\"\"$ (Cancel common terms)

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

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Check:

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Substitute 6 for x in original equation.

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$\"\"$

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

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

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Compare the values the equation is true. $\"\"$

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The value of $\"\"$ .

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