document.write( "Question 442703: If $4,500.00 is investment at 4% simple interest, how much needs to be invested at 10% simple interest so the total interest per year is $730.00.
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Algebra.Com's Answer #305392 by mananth(16949)\"\" \"About 
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$4500 at4%\r
\n" ); document.write( "\n" ); document.write( "interest = 0.04*4500
\n" ); document.write( "Interest = $180\r
\n" ); document.write( "\n" ); document.write( "Total interest required = $ 730
\n" ); document.write( "730-180= $550\r
\n" ); document.write( "\n" ); document.write( "550 = x*0.1*1
\n" ); document.write( "550/0.1=x
\n" ); document.write( "= $5500 @ 10 %\r
\n" ); document.write( "\n" ); document.write( "CHECK\r
\n" ); document.write( "\n" ); document.write( "5500*0.1+4500*0.04 = $730\r
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