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9 July, 14:25

Reid is 3 years old his sister is 4 times older how old is Reid sister

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  1. 9 July, 18:00
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    12yrs

    Step-by-step explanation:

    Let Reid's age be R and his sister's age be A.

    R = 3yrs old

    And his sister is 4 times older than Reid.

    Therefore, his sister's age will be 4 multiplied by Reid's

    That's

    A = 4 x 3yrs

    = 12yrs

    Reid's sister is 12 years old
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