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17 February, 06:29

Rita, ali, and deandre sent a total of 85 text messages during the weekend. Deandre sent 3 times as many messages as ali. Rita sent 5 more messages than ali. How many messages did they each send?

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  1. 17 February, 06:31
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    You would use matrix. r+a+d=85 0r - 3a+d=0 r - a+0d=5 r=21 a=16 d=48 Rita sent 21 text messages, Ali sent 16 text messages, and Deandre sent 48 text messages.
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