Question 278390
Mr.Klinker is 35 and his daughter is 10. 
In how many years will Mr. Klinker be twice as old as his daughter?
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Let the number of years be "x".
Equation:
(35+x) = 2(10+x)
35 + x = 20 + 2x
x = 35-20
x = 15 (K will be twice as old as his daughter in 15 years)
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Cheers,
Stan H.