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19 September, 08:23

You split $2000 between two savings accounts. Account a pays 2% annual interest and account b pays 5% annual interest. After one year, you have earned a total of $77.50 in interest. How much did you invest in each account?

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  1. 19 September, 08:26
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    0.05x+0.02 (2000-x) = 77.5

    0.05x+40-0.02x=77.5

    (0.05-0.02) x=77.5-40

    0.03x=37.5

    X=37.5/0.03=1250 at 2%

    2000-1250=750 at 5%
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