math

In three years time a dog will be as old as his owner was five years ago.Their present ages total 22 years.Find the age of each using simultaneous equations

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  1. age of dog ---- x
    age of owner --- y
    x + y = 22 or y = 22-x

    age of dog 3 years from now: x + 3
    age of owner 5 years ago : y - 5

    x + 3 = y - 5
    x + 3 = 22-x - 5
    2x = 14
    x = 7 , and y = 22-7 = 15

    or the two equations were:
    x + y = 22
    x - y = -8
    add them ..
    2x = 14 , just as before

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    Reiny
  2. Thank u for the answer

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