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## Answers

in how many years time will the fatter be twice as old as his son

let x be the # of years time when the father will be twice as old as his son

the equation will be 42 + x = 2(12 + x)

x = 42-24 = 18 years

check

in 18 years time the father age = 42 + 18 = 60

son age = 12 + 18 =30