document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=28376>Question 28376</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mr. C can invest one sum of money at 7% and a second sum @ 10% and get $640 per year.  If he invests his first sum at 10% and the second @ 7% he will make $550 per year.  How much is he going to invest in the separate accounts? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #15424 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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/cgi-bin/show-face.mpl?user=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=15424\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.07+%2A+a+%2B+.10+%2A+b+=+640 ALIGN=MIDDLE  ALT=\".07+%2A+a+%2B+.10+%2A+b+=+640\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=.10+%2A+a+%2B+.07+%2A+b+=+550 ALIGN=MIDDLE  ALT=\".10+%2A+a+%2B+.07+%2A+b+=+550\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides of each equation by 100<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7+%2A+a+%2B+10+%2A+b+=+64000 ALIGN=MIDDLE  ALT=\"7+%2A+a+%2B+10+%2A+b+=+64000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10+%2A+a+%2B+7+%2A+b+=+55000 ALIGN=MIDDLE  ALT=\"10+%2A+a+%2B+7+%2A+b+=+55000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "multiply both sides of the 2nd equation by 7/10<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7a+%2B+%2849%2F10%29+%2A+b+=+38500 ALIGN=MIDDLE  ALT=\"7a+%2B+%2849%2F10%29+%2A+b+=+38500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "subtract from the 1st equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10+%2A+b+-+4.9+%2A+b+=+15500 ALIGN=MIDDLE  ALT=\"10+%2A+b+-+4.9+%2A+b+=+15500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5.5+%2A+b+=+25500 ALIGN=MIDDLE  ALT=\"5.5+%2A+b+=+25500\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b+=+5000 ALIGN=MIDDLE  ALT=\"b+=+5000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "substitute in the 1st equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7+%2A+a+%2B+50000+=+64000 ALIGN=MIDDLE  ALT=\"7+%2A+a+%2B+50000+=+64000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7+%2A+a+=+14000 ALIGN=MIDDLE  ALT=\"7+%2A+a+=+14000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a+=+2000 ALIGN=MIDDLE  ALT=\"a+=+2000\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "these are the amounts to be invested in dollars </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );