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28-09-2015
Mathematics

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Ruben bought six new books for his collection this increased his collection by 12% how many books did he have before his purchases

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28-09-2015

[tex]1.12 \times x = x + 6\\\\1.12x -x = 6\\\\0.12x = 6\\\\x=50[/tex]

So, before his purchase he had 50 books.

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