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Mathematics, 18.04.2019 23:24 maribelsalgado3

Last year, keiko had $20,000 to invest. she invested some of it in an account that paid %7 simple interest per year, and she invested the rest in an account that paid %5 simple interest per year. after one year, she received a total of $1,280 in interest. how much did she invest in each account?

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