"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?"
In x years, Kim will be (x+15) years old.
How old will her father be in x years?
Twice Kim's age will be equal to her father's age.
98
To determine the number of years in which Kim's father will be twice as old as Kim, we need to set up an equation. Let's assume the number of years is represented by 'x'.
Currently, Kim is 15 years old, so in 'x' years, Kim's age will be 15 + x.
Similarly, currently Kim's father is 39 years old, so in 'x' years, his age will be 39 + x.
According to the problem, Kim's father will be exactly twice as old as Kim in 'x' years. Therefore, we can set up the equation:
39 + x = 2 * (15 + x)
Now, we can solve this equation to find the value of 'x'.