document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=144557>Question 144557</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with the following problem...I have NO idea what to do!! Thanks in advance for your help!\r<BR>\n" );
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document.write( "Roberto invested some money at 6%, and then invested $3000 more than twice this amount at 10%. His total annual income from the two investments was $4200. How much was invested at 10%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #105305 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=105305\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .06x+.10(3,000+2x)=4,200<BR>\n" );
document.write( ".06x+300+.20x=4,200<BR>\n" );
document.write( ".26x=4,200-300<BR>\n" );
document.write( ".26x=3,900<BR>\n" );
document.write( "x=3,900/.26<BR>\n" );
document.write( "x=$15,000 invested @ 6%.<BR>\n" );
document.write( "3,000+2*15,000<BR>\n" );
document.write( "3,000+$30,000=$33,000 invested @ 10%.<BR>\n" );
document.write( "proof:<BR>\n" );
document.write( ".06*15,000+.10*33,000=4,200<BR>\n" );
document.write( "900+3,300=4,200<BR>\n" );
document.write( "4,200=4,200\r<BR>\n" );
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document.write( " </SPAN>\n" );
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