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Susan invests 2 times as much money at 9% as she does at 5%. If her total interest after 1 year is $1380, how much does she have invested at each rate?

 Mar 15, 2020
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.09 (2)  +  .05(x) = 1380          solve for x = 5% amount    the 9% amount = 2x

 Mar 15, 2020

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