document.write( "Question 1031393: Timmy has three times as much money invested at 5% bonds as he has in stocks paying 7%. If his annual income from the stocks and bonds is $158.40, how much has he invested in bonds?\r
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Algebra.Com's Answer #646185 by josmiceli(19441)\"\" \"About 
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Let \"+x+\" = amount invested in stocks at 7%
\n" ); document.write( "\"+3x+\" = amount invested in bonds at 5%
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\n" ); document.write( "\"+.05%2A3x+%2B+.07x+=+158.4+\"
\n" ); document.write( "\"+.15x+%2B+.07x+=+158.4+\"
\n" ); document.write( "\"+.22x+=+158.4+\"
\n" ); document.write( "\"+x+=+720+\"
\n" ); document.write( "and
\n" ); document.write( "\"+3x+=+2160+\"
\n" ); document.write( "$720 was invested in stocks
\n" ); document.write( "$2,160 was invested in bonds
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\n" ); document.write( "check:
\n" ); document.write( "\"+.05%2A3x+%2B+.07x+=+158.4+\"
\n" ); document.write( "\"+.05%2A2160+%2B+.07%2A720+=+158.4+\"
\n" ); document.write( "\"+108+%2B+50.4+=+158.4+\"
\n" ); document.write( "\"+158.4+=+158.4+\"
\n" ); document.write( "OK
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