$\"\"$

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Sentence: Twelve is one fifth of a number.

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Write an equation.

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Let the number be $\"\"$ .

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Twelve equal one fifth a number.

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$\"\"$

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The equation is $\"\"$ .

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$\"\"$

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Find the number.

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$\"\"$ (Original equation)

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

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$\"\"$ (Cancel common terms)

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Therefore, the number $\"\"$ is $\"\"$ .

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$\"\"$

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The number $\"\"$ is $\"\"$ .