A man is thrice as old as his son. five years ago the man was four times as old as his son. find their present ages.
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Answer:
let the age of son =x
let age of man =3x
after 5 years age of man =3x + 5
after 5 years age of son=x+5
A.T.Q
=3x+5=4(x+5)
3x+5=4x+20
3x-4x=5-20
-x=-15
therefore =age of son =15
age of man =15×3=45
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