SOLUTION: Mr. Klinker is 35 and his daugther is 10. In how many years will Mr. Klinker be twice as old as his daugter?

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Question 73693: Mr. Klinker is 35 and his daugther is 10. In how many years will Mr. Klinker be twice as old as his daugter?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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Mr. Klinker is 35 and his daughter is 10. In how many years will Mr. Klinker be twice as old as his daughter?
:
Let x = the number of years for this to occur:
;
Dad in x yrs = twice daughter in x yrs
(x + 35 ) = 2(x + 10)
x + 35 = 2x + 20
x - 2x = 20 - 35
-x = -15
x = 15 yrs from now.
:
:
Check: 35 + 15 = twice (10 + 15)