Mathematics, 20.10.2020 21:01, babas97

Susan invests 3 times as much money at 13% as she does at 9%. If her total interest after 1 year is $1920, how much does she have invested at each rate? Susan invests $ at 9% and $ at 13%.

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Susan invests 3 times as much money at 13% as she does at 9%. If her total interest after 1 year is...