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26 June, 20:22

María has three children. There is a two years age difference between each child. The total ages of all three children is 36 years. Rosa is the oldest child. How old is Rosa? Let R = the age of rosa.

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  1. 26 June, 20:40
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    The ages of the children are:

    R, R-2 and R-4.

    Together they are R + R-2 + R-4 = 36. This is an equation we can solve.

    3R - 6 = 36 = > 3R = 42 = > R = 14

    So the ages are 10, 12 and 14
  2. 26 June, 20:40
    0
    R-2 is age of the second child

    R-4 is age of third child

    R-2+R-4+R=36

    3R = 36+6=42

    R=14
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