$\"\"$

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The growth of an island in a seaward direction may be modeled as $\"\"$ , where $\"\"$ represents the number of years that the lava flows.

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An island has expanded $\"\"$ seaward.

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Write an equation.

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An island has expanded $\"\"$ ,So $\"\"$ .

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Find how long has the lava flowed.

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$\"\"$ (Orginal equation)

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$\"\"$ (Subtract $\"\"$ from each side)

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

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

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

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Therefore,the lava has flowed years $\"\"$ (or) $\"\"$ years and $\"\"$ months.

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$\"\"$

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The lava has flowed years $\"\"$ (or) $\"\"$ years and $\"\"$ months.