document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=214891>Question 214891</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321559444/algebrahomeworkh>Elementary & intermediate algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> How to solve a+b+c=5 2a+3b-c=2 2a+3b-2c=4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #162335 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=162335\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1) a+b+c = 5<BR>\n" );
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document.write( "(2) 2a +3b -c =2<BR>\n" );
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document.write( "(3) 2a +3b -2c = 4<BR>\n" );
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document.write( "(3) - (2) <BR>\n" );
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document.write( "(-2c)-(c) = 4-2 = 2<BR>\n" );
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document.write( "-c =2<BR>\n" );
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document.write( "c=(-2),,,,,,subst  in  (1),,,,,<BR>\n" );
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document.write( "a+b-2 =5<BR>\n" );
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document.write( "a+b = 7<BR>\n" );
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document.write( "Mult  by  2<BR>\n" );
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document.write( "2a+2b = 14<BR>\n" );
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document.write( "Subst  in (2),,,2a +3b -c = 2<BR>\n" );
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document.write( "2a +3b +2 =2,,,,2a +3b =0<BR>\n" );
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document.write( "Subtract ,,{2a +2b =14 }-{2a +3b =0},,,<BR>\n" );
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document.write( "-b=14,,,,b=(-14)<BR>\n" );
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document.write( "Subst  in  (1),,,a+b+c= 5,,,,a-14-2=5,,,,,a=21<BR>\n" );
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document.write( "check (1) 21 -14 -2 =5,,,,ok<BR>\n" );
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document.write( "(2) 2(21) +3(-14) -(-2) = 2,,,,42 -42 +2=2,,,,ok<BR>\n" );
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document.write( "(3)  2(21) +3(-14) -2(-2) =4,,,,42 -42 +4=4,,,,ok<BR>\n" );
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document.write( " </SPAN>\n" );
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