SOLUTION: A mother is 30 years old. Her daughter is 4 years old. In how many years will the age of the mother be triple the age of her daughter?
I've tried doing it by trial and error but
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Question 1096291: A mother is 30 years old. Her daughter is 4 years old. In how many years will the age of the mother be triple the age of her daughter?
I've tried doing it by trial and error but I am looking for the equation as to how I can find this.
Thank you!
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A mother is 30 years old. Her daughter is 4 years old. In how many years will the age of the mother be triple the age of her daughter?
M = D + 26
---------
In x years,
M + x = 3*(D + x)
Sub for M
D+26 + x = 3D + 3x
D = 4
30 + x = 12 + 3x
2x = 18
x = 9
---> in 9 years
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