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Billy had a total of $700 invested in high-yield investments. Part of the $700 was invested at 7% per year and the rest at 6% per year. After on year, the total interest earned was $47. Determine how much Billy invested at each rate.
 May 1, 2012
 #1
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[input]solve( a+b=700, a*0.07+b*0.06=47 )[/input]
 May 2, 2012

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