Mathematics, 11.06.2021 01:30 naomicervero

Use an algebraic approach to solve the problem. A total of $8000 was invested, part of it at 7% interest and the remainder at 9%. If the total yearly interest amounted to $660, how much was invested at each rate?

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Use an algebraic approach to solve the problem. A total of $8000 was invested, part of it at 7% int...