Last year, Carmen had

$20,000

to invest. She invested some of it in an account that paid

9%

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

$1680

in interest. How much did she invest in each account?

$20,000

to invest. She invested some of it in an account that paid

9%

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

$1680

in interest. How much did she invest in each account?

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