document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=193396>Question 193396</A>: <I><SPAN STYLE=\"word-break: break-all;\"> ``Before, solving the problem, I just want to give you the heads up. It's <BR>\n" );
document.write( "Systems of Equation: Application. I can't find the specific title to relate <BR>\n" );
document.write( "with my story problems. My chapter in the book is Chapter Eight, Solving Systems by Substiution, Additional. Hope it helps!\r<BR>\n" );
document.write( "\n" );
document.write( "*Roberto decided to invest 20,000 in two accounts. One fo the accounts pays 5% interest and the other pays 8% interest. The interest he earned in one year was $1210. How much did he have invested in each account?* </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #145192 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=145192\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let x and y be the amounts invested at 5 and 8% respectively<BR>\n" );
document.write( ":<BR>\n" );
document.write( "x+y=20000...............eq 1<BR>\n" );
document.write( ".05x+.08y=1210..........eq 2<BR>\n" );
document.write( ":<BR>\n" );
document.write( "rewrite eq 1 to x=20000-y and plug this into eq 2<BR>\n" );
document.write( ":<BR>\n" );
document.write( ".05(20000-y)+.08y=1210<BR>\n" );
document.write( ":<BR>\n" );
document.write( "1000-.05y+.08y=1210<BR>\n" );
document.write( ":<BR>\n" );
document.write( ".03y=210<BR>\n" );
document.write( ":<BR>\n" );
document.write( "y=7000 dollars invested at 8%<BR>\n" );
document.write( ":<BR>\n" );
document.write( "x=20000-y=20000-7000=13000 invested at 5% </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );