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asked Feb 23 in Mathematics by (220 points)

1 Answer

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answered Feb 25 by Mathworker

Let the sister's age = x

2x = 4 (your age by then)

x = 4/2 = 2 years

This shows your sister is two years younger than you.

Now your sister's age is: 

2 + (100 - 4) years

2 + 96 = 98 yrs

Hence your sister is 98 years old now.

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