document.write( "Question 111513: Vito invested $500, part at 9% per annum, and the rest at 11% per annum. After one year, the interest earned on the 9% investment was $20 less than the interest on the 11% investment. How much did he invest at each rate? \n" ); document.write( "
Algebra.Com's Answer #81445 by elima(1433)\"\" \"About 
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Vito invested $500, part at 9% per annum, and the rest at 11% per annum. After one year, the interest earned on the 9% investment was $20 less than the interest on the 11% investment. How much did he invest at each rate?
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\n" ); document.write( "amount invested at each = x
\n" ); document.write( ".09(500-x)
\n" ); document.write( ".11x
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\n" ); document.write( ".09(500-x)(1)-20=.11x
\n" ); document.write( "45-.09x-20=.11x
\n" ); document.write( "25=.11x+.09x
\n" ); document.write( "25=.2x
\n" ); document.write( "125=x
\n" ); document.write( "125 = amount at 11%
\n" ); document.write( "500-125=375 = amount at 9%
\n" ); document.write( ":)
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