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Q. 3. (b) Given Sara’s age today to be y years. Think of her age in the future or in the past. What will the following expression indicate?

$y+7,$ $y-3,$ $y+4\frac{1}{2},$ $y-2\frac{1}{2}.$

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Her age in past = $(y-3),(y-2\frac{1}{2})$

Her age in future = $(y+7),(y+4\frac{1}{2})$

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