SOLUTION: Mary is 41 years old and her daughter is 9. In how many years will the mother be three times as old as her daughter?

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Question 762865: Mary is 41 years old and her daughter is 9. In how many years will the mother be three times as old as her daughter?
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
41 + x = 9 + 3x
41 - 9 = 3x - x
32 = 2x
x = 16 years
Proof:
41 + 16 = 9 + 3(16)
57 = 9 + 48
57 = 57
Hope this helps.
:-)