SOLUTION: Ross is twenty years older than his niece Krystal. Krystal has worked out that in five years' time her uncle will be twice as old as she will be. Find Krystal's age

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Question 454947: Ross is twenty years older than his niece Krystal. Krystal has worked out that in five years' time her uncle will be twice as old as she will be. Find Krystal's age
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Ross is twenty years older than his niece Krystal. Krystal has worked out that in five years' time her uncle will be twice as old as she will be. Find Krystal's age
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Equations:
r = k+20
(r+5)= 2(k+5)
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Substitute for "r" and solve for "K":
(k+25) = 2k + 10
k = 15 yrs (Krystal's age now)
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Cheers,
Stan H.