document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=26100>Question 26100</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with the following: (my son asked me to help but I'm VERY rusty)\r<BR>\n" );
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document.write( "3A + B + 4C = 34<BR>\n" );
document.write( "2A + 2B + C = 26<BR>\n" );
document.write( "A + 2B + 3C = 23 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #14030 by </B><A HREF=/tutors/aboutme.mpl?userid=askmemath><B>askmemath(368)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=askmemath><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=14030\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3 equations and 3 unknowns. Take 2 equations at a time and try to eliminate 1 common variable\r<BR>\n" );
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document.write( "3A + B + 4C = 34        (1)<BR>\n" );
document.write( "2A + 2B + C = 26        (2)<BR>\n" );
document.write( "A + 2B + 3C = 23        (3)\r<BR>\n" );
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document.write( "Subtracting (3) fm (2)<BR>\n" );
document.write( "A - 2C = 3              (4)\r<BR>\n" );
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document.write( "Multiplying (1) with 2<BR>\n" );
document.write( "6A+2B+8C = 68                 (5)<BR>\n" );
document.write( "Subtracting (2) fm (5)<BR>\n" );
document.write( "4A+7C = 42     (6)\r<BR>\n" );
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document.write( "Multiplying (4) with 4<BR>\n" );
document.write( "4A-8C = 12            (7)\r<BR>\n" );
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document.write( "Subtracting (7) fm (6)<BR>\n" );
document.write( "15C = 30<BR>\n" );
document.write( "Dividing by 15 throughout<BR>\n" );
document.write( "C = 2\r<BR>\n" );
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document.write( "Putting this back in (4)<BR>\n" );
document.write( "A - 2(2) = 3<BR>\n" );
document.write( "Adding 4 on both sides <BR>\n" );
document.write( "A = 7<BR>\n" );
document.write( "Putting this back in any of (1),(3),(2)<BR>\n" );
document.write( "B = 5 </SPAN>\n" );
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