SOLUTION: 38. Aunt Mary, 42 years old, has a 12-year old niece. In how many years will the aunt be twice as old as her niece?

Question 926441: 38. Aunt Mary, 42 years old, has a 12-year old niece. In how many years will the aunt be twice as old as her niece?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
42 + x = 2(12 + x)
42 + x = 24 + 2x
2x - x = 42 - 24
x = 18
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answer:
in 18 years the aunt will be twice as old as her niece
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