document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=165447>Question 165447</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0669433942/algebrahomeworkh>HEATH Algebra 2 An itergrated Approach</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I have to solve the system of equations which are<BR>\n" );
document.write( "2x-4y+2z=16<BR>\n" );
document.write( "-2x+5y+2z=-34<BR>\n" );
document.write( "x-2y+2z=4\r<BR>\n" );
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document.write( "I have simplified the 3rd equation to x=2y-2z+4. i then put that into the first equation and had 2(2y-2z=4)-4y+2z=16 to get z equals -4. my problem is finding the x and y variables. when i try to find them my y's and x's always cancel each other out. please help me. :) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #121943 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=121943\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> substitute the z value into the 2nd and 3rd eqns\r<BR>\n" );
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document.write( "-2x+5y+2(-4)=-34 __ -2x+5y=-26\r<BR>\n" );
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document.write( "x-2y+2(-4)=4 __ x-2y=12 __ multiplying by 2 __ 2x-4y=24\r<BR>\n" );
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document.write( "adding the equations __ -2x+5y+2x-4y=-26+24 __ y=-2\r<BR>\n" );
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document.write( "substituting __ x-2(-2)=12 __ x=8 </SPAN>\n" );
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