document.write( "Question 336519: Kaufman Financial Corp. makes investments for corporate clients. It makes an investment of $3700 for one year at simple interest, yielding $297. Part of the money is invested at 7% and the rest at 9%. How much was invested?
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Algebra.Com's Answer #241234 by Fombitz(32388)\"\" \"About 
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Let A be the amount invested at 7%, B the amount invested in 9%.
\n" ); document.write( "1.\"A%2BB=3700\"
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\n" ); document.write( "\"%287%2F100%29A%2B%289%2F100%29B=297\"
\n" ); document.write( "2.\"7A%2B9B=29700\"
\n" ); document.write( "From eq. 1,
\n" ); document.write( "\"A=3700-B\"
\n" ); document.write( "Substitute into eq. 2,
\n" ); document.write( "\"7%283700-B%29%2B9B=29700\"
\n" ); document.write( "\"25900-7B%2B9B=29700\"
\n" ); document.write( "\"2B=3800\"
\n" ); document.write( "\"highlight%28B=1900%29\"
\n" ); document.write( "Then from eq. 1,
\n" ); document.write( "\"A%2B1900=3700\"
\n" ); document.write( "\"highlight%28A=1800%29\"
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\n" ); document.write( "$1800 invested at 7% and $1900 invested at 9%.
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