document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1023068>Question 1023068</A>: <I><SPAN STYLE=\"word-break: break-all;\"> use the 4 step method and 2 variables\r<BR>\n" );
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document.write( "If 10 pens and 15 pads of paper cost $26, and 5 pens and 10 pads cost $16, find the cost of a pen and a pad.\r<BR>\n" );
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document.write( "x=pen y=pad<BR>\n" );
document.write( "10x + 15y =$26<BR>\n" );
document.write( "5x + 10y =$16\r<BR>\n" );
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document.write( "-2(5x+10y=16)<BR>\n" );
document.write( "-10x+-20y=-32\r<BR>\n" );
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document.write( "10x+15y=26<BR>\n" );
document.write( "-10x+-20y=-32<BR>\n" );
document.write( "-5y=-6 <BR>\n" );
document.write( "-5y=-5<BR>\n" );
document.write( "y=6/5\r<BR>\n" );
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document.write( "5x+10(6/5)=16  5goes into 10 2times<BR>\n" );
document.write( "5x+2*6=16<BR>\n" );
document.write( "5x+12=16<BR>\n" );
document.write( "5x-12=-12\r<BR>\n" );
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document.write( "5x=4<BR>\n" );
document.write( "5  5<BR>\n" );
document.write( "x=4/5\r<BR>\n" );
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document.write( "I come up with fractions this does not seem right. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #638599 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=638599\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x, price for one pen<BR>\n" );
document.write( "y, price for one pad\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%2810x%2B15y=26%2C5x%2B10y=16%29 ALIGN=MIDDLE  ALT=\"system%2810x%2B15y=26%2C5x%2B10y=16%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >-----same as the system you found.\r<BR>\n" );
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document.write( "Your work appears to be the use of Elimination Method, at least part of the way.  Multiply the 16 equation by 2:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%2810x%2B15y=26%2C10x%2B20y=32%29 ALIGN=MIDDLE  ALT=\"system%2810x%2B15y=26%2C10x%2B20y=32%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >----the equivalent system.\r<BR>\n" );
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document.write( "Add the opposite of the 26 equation to the 32 equation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-%2810x%2B15y%29%2B%2810x%2B20y%29=-26%2B32 ALIGN=MIDDLE  ALT=\"-%2810x%2B15y%29%2B%2810x%2B20y%29=-26%2B32\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5y=6 ALIGN=MIDDLE  ALT=\"5y=6\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28y=6%2F5%29 ALIGN=MIDDLE  ALT=\"highlight%28y=6%2F5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, which means <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=1%261%2F5 ALIGN=MIDDLE  ALT=\"y=1%261%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or $1 20cents for one pad of paper.\r<BR>\n" );
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document.write( "Now what is x?<BR>\n" );
document.write( "Go to either of the ORIGINAL equations to find x.  Now you know y.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x%2B15y=26 ALIGN=MIDDLE  ALT=\"10x%2B15y=26\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x=26-15y ALIGN=MIDDLE  ALT=\"10x=26-15y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x=26-15%286%2F5%29 ALIGN=MIDDLE  ALT=\"10x=26-15%286%2F5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x=26-3%2A6 ALIGN=MIDDLE  ALT=\"10x=26-3%2A6\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x=26-18 ALIGN=MIDDLE  ALT=\"10x=26-18\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10x=8 ALIGN=MIDDLE  ALT=\"10x=8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5x=4 ALIGN=MIDDLE  ALT=\"5x=4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28x=4%2F5%29 ALIGN=MIDDLE  ALT=\"highlight%28x=4%2F5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >--------which means 80 cents for a pencil. </SPAN>\n" );
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