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 762571: 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 josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
y = in how many years...

41%2By and 9%2By are their ages in that passage of years.
%2841%2By%29%2F%289%2By%29=3
Find y.
41%2By=3%28y%2B9%29
41%2By=3y%2B27
2y=41-27
y=7