document.write( "Question 456875: Equal amounts are invested at 6%, 7%, and 9% annual interest. If the three investments yield a total of $880 annual interest, find the total investment. \n" ); document.write( "
Algebra.Com's Answer #313511 by mananth(16946)\"\" \"About 
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6% ----x
\n" ); document.write( "7%-----x
\n" ); document.write( "9%-----y\r
\n" ); document.write( "\n" ); document.write( "880 interest\r
\n" ); document.write( "\n" ); document.write( "6x+7x+9x=880*100
\n" ); document.write( "22x=88000
\n" ); document.write( "x=88000/22
\n" ); document.write( "=4000
\n" ); document.write( "$ 4000 *3=$12,000
\n" ); document.write( "
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