document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=769883>Question 769883</A>: <I><SPAN STYLE=\"word-break: break-all;\"> weight of a tank full with water is 27.5kg.Its weight is 12.2kg when the tank is 1/4 full.Find weight of empty tank </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #469101 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</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=469101\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let m = mass of the tank by itself (when empty).\r<BR>\n" );
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document.write( "Let w = mass of water in FULL tank.\r<BR>\n" );
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document.write( "Full tank is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%2Bw=27.5 ALIGN=MIDDLE  ALT=\"m%2Bw=27.5\"   DISABLED_style= \"max-width:90%; height:auto;\" > kg.<BR>\n" );
document.write( "Quarter-full tank is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%2Bw%2F4=12.2 ALIGN=MIDDLE  ALT=\"m%2Bw%2F4=12.2\"   DISABLED_style= \"max-width:90%; height:auto;\" > kg.\r<BR>\n" );
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document.write( "Those are two equations using unknown variables m and w.  Various ways possible to solve the system.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%2Bw%2F4=12.2+ ALIGN=MIDDLE  ALT=\"m%2Bw%2F4=12.2+\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%28m%2Bw%2F4%29=4%2812.2%29 ALIGN=MIDDLE  ALT=\"4%28m%2Bw%2F4%29=4%2812.2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4m%2Bw=48.8 ALIGN=MIDDLE  ALT=\"4m%2Bw=48.8\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%284m%2Bw%29-%28m%2Bw%29=48.8-27.5 ALIGN=MIDDLE  ALT=\"%284m%2Bw%29-%28m%2Bw%29=48.8-27.5\"   DISABLED_style= \"max-width:90%; height:auto;\" >  which is just subtracting the Full equation from the Quarter-full equation.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3m=21.3 ALIGN=MIDDLE  ALT=\"3m=21.3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28m=7.1%29 ALIGN=MIDDLE  ALT=\"highlight%28m=7.1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > kg., the empty tank.\r<BR>\n" );
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document.write( "You can continue for finding w.  Either original equation can be used.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%2Bw=27.5 ALIGN=MIDDLE  ALT=\"m%2Bw=27.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=w=27.5-m ALIGN=MIDDLE  ALT=\"w=27.5-m\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "since we found m now,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=w=27.5-7.1 ALIGN=MIDDLE  ALT=\"w=27.5-7.1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28w=20.4%29 ALIGN=MIDDLE  ALT=\"highlight%28w=20.4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > kg. water when full. </SPAN>\n" );
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