SOLUTION: Arthur is 16years old and his sister Renie 10years old. how many years go was Arthur twice the age of Renie

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Question 646055: Arthur is 16years old and his sister Renie 10years old. how many years go was Arthur twice the age of Renie
Answer by sachi(548) About Me  (Show Source):
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Arthur is 16years old and his sister Renie 10years old
say x yrs ago Arthur was twice the age of Renie
so 16-x=2(10-x)=20-2x
or x=20-16=4
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