document.write( "Question 719215: Phyllis invested 27000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 7 percent per year. After one year the total interest earned on these investments was 1530 dollars. How much money did she invest at each rate? \n" ); document.write( "

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Phyllis invested 27000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 7 percent per year. After one year the total interest earned on these investments was 1530 dollars. How much money did she invest at each rate?
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\n" ); document.write( "Equation:
\n" ); document.write( "Quantity Equation: x + y = 27000
\n" ); document.write( "Interest Equation:4x +7y = 153000
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\n" ); document.write( "Modify to eliminate:
\n" ); document.write( "4x + 4y = 4*27000
\n" ); document.write( "4x + 7y = 153000
\n" ); document.write( "-------
\n" ); document.write( "3y = 45000
\n" ); document.write( "y = $15000 (amt invested at 4%
\n" ); document.write( "x = 27000-15000 (amt. invested at 7%
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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