document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1060865>Question 1060865</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm having trouble understanding how they got the answer this is what the example shows<BR>\n" );
document.write( " A cashier has 90 dimes and nickels in his cash drawer. If the total value of the coins is $6.40,how many nickels are in the drawer?<BR>\n" );
document.write( "5x+10(90-x)=640<BR>\n" );
document.write( "5x+900-10x=640<BR>\n" );
document.write( "-5x=-260<BR>\n" );
document.write( "5x=260<BR>\n" );
document.write( "X=52<BR>\n" );
document.write( "How did they come up with this solution?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #675720 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=675720\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I do this the \" long way \" which might<BR>\n" );
document.write( "be easier to understand<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+ ALIGN=MIDDLE  ALT=\"+n+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = number of nickels <BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+ ALIGN=MIDDLE  ALT=\"+d+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = number of dimes<BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+%2B+d+=+90+ ALIGN=MIDDLE  ALT=\"+n+%2B+d+=+90+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5n+%2B+10d+=+640+ ALIGN=MIDDLE  ALT=\"+5n+%2B+10d+=+640+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ( in cents )<BR>\n" );
document.write( "-----------------------------------<BR>\n" );
document.write( "Multiply both sides of (1) by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5+ ALIGN=MIDDLE  ALT=\"+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" > and<BR>\n" );
document.write( "subtract (1) from (2)<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5n+%2B+10d+=+640+ ALIGN=MIDDLE  ALT=\"+5n+%2B+10d+=+640+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-5n+-+5d+=+-450+ ALIGN=MIDDLE  ALT=\"+-5n+-+5d+=+-450+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5d+=+190+ ALIGN=MIDDLE  ALT=\"+5d+=+190+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+d+=+38+ ALIGN=MIDDLE  ALT=\"+d+=+38+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "and<BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+%2B+d+=+90+ ALIGN=MIDDLE  ALT=\"+n+%2B+d+=+90+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+%2B+38+=+90+ ALIGN=MIDDLE  ALT=\"+n+%2B+38+=+90+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(1) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+n+=+52+ ALIGN=MIDDLE  ALT=\"+n+=+52+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "There are 52 nickels and 38 dimes<BR>\n" );
document.write( "( same as their answer, since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+X+ ALIGN=MIDDLE  ALT=\"+X+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is number of nickels )<BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "check answer:<BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5n+%2B+10d+=+640+ ALIGN=MIDDLE  ALT=\"+5n+%2B+10d+=+640+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5%2A52+%2B+10%2A38+=+640+ ALIGN=MIDDLE  ALT=\"+5%2A52+%2B+10%2A38+=+640+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+260+%2B+380+=+640+ ALIGN=MIDDLE  ALT=\"+260+%2B+380+=+640+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(2) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+640+=+640+ ALIGN=MIDDLE  ALT=\"+640+=+640+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );