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

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The expression is $\"\"$

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Multiplication property of equality: If $\"\"$ then $\"\"$ , $\"\"$ .

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$\"\"$ (Multiply each side by 7)

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide each side by 3)

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$\"\"$ (Cancel common terms)

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

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

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$\"\"$

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$\"\"$

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Check:

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Substitutive the value $\"\"$ on original equation

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$\"\"$

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

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The solution $\"\"$ .