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

User Jared Updike
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1.12 * x = x + 6\\\\1.12x -x = 6\\\\0.12x = 6\\\\x=50

So, before his purchase he had 50 books.
User Fedepaol
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