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How do you solve this A father is 9 times the age of his son In 5 years he will be 4 times the age of his son How old are they now?
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x - age of the father and of the son age . x=9y . x+5=4(y+5) => 9+5=4y+20 => 5y=15 => y=3 x=9y => x=27