SOLUTION: A 25 year old mother has a 5 year old daughter. In how many years will the mother be exactly twice as old as the daughter?

Question 1017711: A 25 year old mother has a 5 year old daughter. In how many years will the mother be exactly twice as old as the daughter?
Found 2 solutions by stanbon, addingup:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A 25 year old mother has a 5 year old daughter. In how many years will the mother be exactly twice as old as the daughter?
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Let the # of years you need be "x"::
25+x = 2(5+x)
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25+x = 10 + 2x
x = 15 years
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Cheers,
Stan H.
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Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
2(5+x) = 25+x Multiply on left
10+2x = 25+x Subtract 10 and x on both sides
x = 15 is your answer. In 15 years:
mother: 25+15= 40
daughter: 5+15 = 20 so mother is twice as old as the daughter.

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