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Answer:
son's age = 15
father's age = 45
Step-by-step explanation:
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Step-by-step explanation:
Let the present age of son be X years.
Then his father's age =3 times as old as his son =3X years
age of son 5years ago is (X-5) years and his father's age would be (3X-5) years
and his father's age then 4times his son
=4(X-5) years
=>3X-5=4(X-5)
=>3X-5=4X-20
=>-5+20=4X-3X
=>15=X
=>X=15 years
The present age of son =15 years
The present age of his father =3×15=45years
Check:-
Son's age =15 years
His father's age=3times his son =3×15=45years
5 years ago their ages= 10 years and 40 years and father 4times his son (4×10=40)
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