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An investment of $2500 is made at an annual interest rate of 5.5% .How much additional money must be invested at an annual simple interest rate of 8% so that the total interest earned is 7% of the total investment?

  • math - ,

    2500*.055 + x * .08 = (2500+x)*.07
    x = 3750

    check:

    5.5% of 2500 = 137.50
    8% of 3750 = 300.00

    7% of 6250 = 437.50

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