hayleydouglas0
hayleydouglas0 hayleydouglas0
  • 17-11-2017
  • Mathematics
contestada

Keith is thirteen years older than nephew William. In four years Keith will be twice as old as William. How old is William now?

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redgamer821
redgamer821 redgamer821
  • 17-11-2017
William is 24 years old. (I think)
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ralucaflorea
ralucaflorea ralucaflorea
  • 17-11-2017
Let's call Keith x and William y
x=13+y

4+x=2y

substitute x with 13+y:
4+(13+y)=2y
17+y=2y
17=y

William is 17 years old
Answer Link

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