Problema Solution
Kim is 15. Kim's father is 39. In how many years will Kim's father be exactly twice as old as Kim will be?
Answer provided by our tutors
let x = the number of years after which Kim's father be exactly twice as old as Kim
39 + x = 2(15 + x)
by solving we find
x = 9 years
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indeed, in 9 years Kim's father will be 38 years old while Kim will be 15 + 9 = 24 years old and 48 = 2*24.
in 9 years Kim's father be exactly twice as old as Kim will be.