Mathematics, 23.02.2020 22:08, gensevilla54

In a certain year, the average e-mail user sent or received 143 e-mails each day. The number of e-mails received was 3 more than thrice the number sent. How many were sent and how many were received each day?

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In a certain year, the average e-mail user sent or received 143 e-mails each day. The number of e-ma...