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Investing inhertance.Norman invested one-half of his inheritance in a CD that had a 10% annoul yield. He lent one-quarter of of his inheritance to his brother -in-law at 12% simple interest. His income from these two investments was $6400 for 1 year. How much was the inheritance?

  • math -

    .10(x/2) + .12(x/4) = 6400
    x = 80,000

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