8.) The sum of the present ages of a father and son is 53 years. Four years ago, the father's age was four
times the age of the son. Find their present ages.
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→ Let age of father be x yrs
∴ son = (53-x) yrs
∴ By given condition
x−4=4(53−x−4)
∴x−4=4(49−x)
∴x−4=196−4x
∴5x=196+4
∴x=5200=40yrs
∴ father age = 40 yrs
∴ son age = 53 - 40
=13yrs
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