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Mathematics, 28.01.2020 12:31 kayranicole1

At aliyah's printing company llc there are two kinds of printing presses: model a which can print 40 books per day and model b which can print 45 books per day. the company owns 15 total printing presses and this allows them to print 635 books per day. how many of each type of press do they have?

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