document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=125515>Question 125515</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Invested $22,000, part at 8% and part at 7%.  If the total interest at the end of the year is $1,710, how much did she invest at 8%?\r<BR>\n" );
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document.write( "Invested $20,000, part at 14% and part at 13%. If the total interest at the end of the year is 2,720, how much did he invest at 14%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #91955 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=91955\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Invested $22,000, part at 8% and part at 7%. If the total interest at the end of the year is $1,710, how much did she invest at 8%? <BR>\n" );
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document.write( "I'll do one and leave the other to you.<BR>\n" );
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document.write( "Let amt invested at 8% be \"x\" ; interest is 0.08x dollars<BR>\n" );
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document.write( "Amt invest at 7% is \"22000-x ; interest is 0.07(22000-x) = 1540-0.07x dollars<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "interest + interest = 1710 dollars<BR>\n" );
document.write( "0.08x + 1540-0.07x = 1710<BR>\n" );
document.write( "0.01x = 170<BR>\n" );
document.write( "x = $17000 (amt. invested at 8%)<BR>\n" );
document.write( "22000-x = 5000 (amt invested at 7%)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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