santiagojohn0101 santiagojohn0101
  • 24-05-2019
  • Mathematics
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A boy is n years old. His sister is four times as old. The sister's age is

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123kiwi
123kiwi 123kiwi
  • 25-05-2019

The sister is 4n yrs old.

That is because 4 times n is 4n.

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