document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=176308>Question 176308</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A>    2x-3y+5y=2<BR>\n" );
document.write( "B>    3x+2y-z=12<BR>\n" );
document.write( "C>     x+4y+z=18\r<BR>\n" );
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document.write( "FIRST STEP IN THE ELIMINATION OF THE VARIABLE Y <BR>\n" );
document.write( " A) MULTIPLY EQUATION B BY -2 AAND ADD EQUATIONS B AND C\r<BR>\n" );
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document.write( " B) MULTIPLY B BY -2 AND ADD EQUAIONS A AND B\r<BR>\n" );
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document.write( "C) OTHER, IF SO... HOW? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #131447 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=131447\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A> 2x-3y+5y=2<BR>\n" );
document.write( "B> 3x+2y-z=12<BR>\n" );
document.write( "C> x+4y+z=18 \r<BR>\n" );
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document.write( "\n" );
document.write( "FIRST STEP IN THE ELIMINATION OF THE VARIABLE Y <BR>\n" );
document.write( "A) MULTIPLY EQUATION B BY -2 AAND ADD EQUATIONS B AND C <BR>\n" );
document.write( "B) MULTIPLY B BY -2 AND ADD EQUAIONS A AND B <BR>\n" );
document.write( "C) OTHER, IF SO... HOW?<BR>\n" );
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document.write( "I'll assume you meant 5z in eqn A.<BR>\n" );
document.write( "You need to eliminate a variable, y is ok, from 2 eqns using, leaving 2 eqns with 2 unknowns.<BR>\n" );
document.write( "Step A is good, gives an eqn in x and z.<BR>\n" );
document.write( "Step B is not good, it eliminates x, not y.<BR>\n" );
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document.write( "A better choice is to eliminate x, because its coeff in eqn C is 1, making it easy to scale to match eqns A and B.<BR>\n" );
document.write( "Whatever variable you choose to eliminate, you have to eliminate in from 2 eqns.<BR>\n" );
document.write( "Try eliminating x.  Email me if you need more help. (the thank you notes go to my email.)<BR>\n" );
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document.write( "An update:  z is even better for elimination, as B and C have one z in them.  Just add B and C and z is gone. </SPAN>\n" );
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