$\"\"$

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The equation is $\"\"$ .

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$\"\"$ (Divide each side by 36)

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

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$\"\"$ (Evalute powers: $\"\"$ )

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$\"\"$ (Evalute powers: $\"\"$ )

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$\"\"$ (Powers of product: $\"\"$ )

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$\"\"$ (Apply squareroot each side)

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$\"\"$ (Cancel roots and squares) $\"\"$

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