document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1021671>Question 1021671</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, I am studying for a test and I can’t figure out how to solve this:\r<BR>\n" );
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document.write( "Danny needs to send 4 packages of different weights. The cost of the stamps depends on the weight of the package. The most expensive stamp costs 3 times more than the cheapest stamp. All together he paid 120 dollars.  How much is the cheapest stamp and how much is the most expensive?<BR>\n" );
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document.write( "We are learning an = a1+d(n-1)<BR>\n" );
document.write( "Answer is 15 and 45\r<BR>\n" );
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document.write( "Thanks!<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #637426 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=637426\">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=a%5B4%5D=3a%5B1%5D ALIGN=MIDDLE  ALT=\"a%5B4%5D=3a%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B4%5D=a%5B1%5D%2B3d ALIGN=MIDDLE  ALT=\"a%5B4%5D=a%5B1%5D%2B3d\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So then,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3a%5B1%5D=a%5B1%5D%2B3d ALIGN=MIDDLE  ALT=\"3a%5B1%5D=a%5B1%5D%2B3d\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2a%5B1%5D=3d ALIGN=MIDDLE  ALT=\"2a%5B1%5D=3d\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d=%282%2F3%29a%5B1%5D ALIGN=MIDDLE  ALT=\"d=%282%2F3%29a%5B1%5D\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "You also know,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D%2Ba%5B2%5D%2Ba%5B3%5D%2Ba%5B4%5D=120 ALIGN=MIDDLE  ALT=\"a%5B1%5D%2Ba%5B2%5D%2Ba%5B3%5D%2Ba%5B4%5D=120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D%2B%28a%5B1%5D%2Bd%29%2B%28a%5B1%5D%2B2d%29%2B%28a%5B1%5D%2B3d%29=120 ALIGN=MIDDLE  ALT=\"a%5B1%5D%2B%28a%5B1%5D%2Bd%29%2B%28a%5B1%5D%2B2d%29%2B%28a%5B1%5D%2B3d%29=120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4a%5B1%5D%2B6d=120 ALIGN=MIDDLE  ALT=\"4a%5B1%5D%2B6d=120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substituting,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4a%5B1%5D%2B6%282%2F3%29a%5B1%5D=120 ALIGN=MIDDLE  ALT=\"4a%5B1%5D%2B6%282%2F3%29a%5B1%5D=120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4a%5B1%5D%2B4a%5B1%5D=120 ALIGN=MIDDLE  ALT=\"4a%5B1%5D%2B4a%5B1%5D=120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=8a%5B1%5D=120 ALIGN=MIDDLE  ALT=\"8a%5B1%5D=120\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D=120%2F8 ALIGN=MIDDLE  ALT=\"a%5B1%5D=120%2F8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B1%5D=15 ALIGN=MIDDLE  ALT=\"a%5B1%5D=15\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5B4%5D=3%2815%29=45 ALIGN=MIDDLE  ALT=\"a%5B4%5D=3%2815%29=45\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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