two investments earn an annual income of $645. an investment earns an annual simple interest rate of 7.7%, and the other investment earns an annual simple interest rate of 6.9%. the total amount invested

two investments earn an annual income of $645. an investment earns an annual simple interest rate of 7.7%, and the other investment earns an annual simple interest rate of 6.9%. the total amount invested is $9000. how much is invested in each account?

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Two investments earn an annual income of $645. an investment earns an annual simple interest rate of 7.7%, and the other investment earns an annual simple interest rate of 6.9%. …

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