document.write( "Question 896619: Equal amounts are invested at 3%, 7%, and 9% annual interest. If the three investments yield a total of $684 annual interest, find the total investment. \n" ); document.write( "
Algebra.Com's Answer #543709 by josmiceli(19441)\"\" \"About 
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\"+.03x+%2B+.07x+%2B+.09x+=+684+\"
\n" ); document.write( "\"+.19x+=+684+\"
\n" ); document.write( "\"+3600+\"
\n" ); document.write( "The total investment was
\n" ); document.write( "\"+3%2A3600+=+10800+\"
\n" ); document.write( "$10,800\r
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