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

17-11-2017

William is 24 years old. (I think)

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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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