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There were 36.000 hardback copies of a certain novel sold

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There were 36.000 hardback copies of a certain novel sold [#permalink] New post 22 Aug 2007, 15:32
There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?

explain please
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Re: books [#permalink] New post 22 Aug 2007, 16:34
Ravshonbek wrote:
There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?

explain please


Two time intervals are considered here.

Before Paperback: 36,000 of hardback sold
We also know that total sold = 441,000; thus, total sold after Paperback = 441,000 - 36,000 = 405,000

After Paperback, we have:
9*H = P
P + H = 405,000
Solve for H: H = 40,500
Solve for P: P = 9*40,500 = 364,500
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 [#permalink] New post 23 Aug 2007, 01:23
Easy one:

P = 9H
H + 9H = 441,000 - 36,000
10H = 405,000
H = 40,500
P = 364,500
  [#permalink] 23 Aug 2007, 01:23
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There were 36.000 hardback copies of a certain novel sold

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