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What was the ratio of Arve's age to that of her grandfather's age?

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Arve's grandfather was 5 times older to her 9 years ago.
He would be 2 times of her age 18 years from now.
12 years ago, what was the ratio of Arve's age to that of her grandfather's age?

posted Aug 28 by Karan Joglekar

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1 Answer

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12 years ago Grandfather was 7 times older than Arve


G-9=5*(A-9) ---------> (1)
G+18= 2*(A+18) ---------> (2)
(A-12):(G-12)=?


(1) --> G=5A-36
(2) --> G=2A+18
5A-36=2A+18 --> A=18, G=54
(A-12):(G-12)=1:7

answer Aug 28 by Hanifa Mammadov



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