document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=112427>Question 112427</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321269470/algebrahomeworkh>Introductory Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 11%. His total annual income from the two investments was $3990. How much was invested at 11%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #82029 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=82029\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .07x+.11(2x+2000)=3990<BR>\n" );
document.write( ".07x+.22x+220=3990<BR>\n" );
document.write( ".29x=3990-220<BR>\n" );
document.write( ".29x=3770<BR>\n" );
document.write( "x=3770/.29<BR>\n" );
document.write( "x=$13,000 amount invested @ 7%<BR>\n" );
document.write( "2*13,000+2000=26,000+2,000=$28,000 amount invested @ 11%.<BR>\n" );
document.write( "proof<BR>\n" );
document.write( ".07*13,000+.11*28,000=3990<BR>\n" );
document.write( "910+3080=3990<BR>\n" );
document.write( "3990=3990 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );