4 years ago my father's age was 4 times that of my age at present the sum of my father's age and that's of mine is 53 years what are present ages, what are our 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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