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John is 20 years older than Brian. 12 years ago, John was

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John is 20 years older than Brian. 12 years ago, John was [#permalink] New post 07 May 2012, 04:07
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John is 20 years older than Brian. 12 years ago, John was twice as old as Brian. Howold is Brian?


what's wrong with this word translation ??'

J= B + 20

J-12=2 (B+8)
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Re: John is 20 years older than Brian. 12 years ago, John was [#permalink] New post 07 May 2012, 04:46
carcass wrote:
John is 20 years older than Brian. 12 years ago, John was twice as old as Brian. Howold is Brian?


what's wrong with this word translation ??'

J= B + 20

J-12=2 (B+8)


John is 20 years older than Brian --> J=B+20;
12 years ago, John was twice as old as Brian --> J-12=2*(B-12);

Solving: B=32.

P.S. Please type in the questions which contain only the plain text rather than attach the screenshot.
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Re: John is 20 years older than Brian. 12 years ago, John was   [#permalink] 07 May 2012, 04:46
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