\"\"

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Let x be the number of brownies which are having by Anna.

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The number of brownies of Sarah is the half of the browns of Anna or \"\".

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The number of brownies of Rob is the third of the browns of Sarah or \"\".

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The number of brownies of Trina is the fourth of the browns of Rob or \"\".

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But Trina has 3 brownies, therefore \"\".

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Multiply each side by 24.

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\"\"

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\"\".

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The number of brownies of Anna \"\".\"\"

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The option H is correct answer.