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Mathematics, 30.09.2019 02:30 shanilafaridor97hl

Big ! in a hall there are 2100 seats. in a row there are either 45 or 40 seats. there are three times more rows with 45 seats than with 40 seats. how many rows are there?

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Big ! in a hall there are 2100 seats. in a row there are either 45 or 40 seats. there are three time...
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