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Mathematics, 15.11.2019 22:31 allisonorlov
Anew photocopier works 4 times as fast as an old one. when the machines work together, a university can produce all its staff manuals in 28 hours. find the time it would take each machine, working online, to complete the job.
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Anew photocopier works 4 times as fast as an old one. when the machines work together, a university...
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