document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=258522>Question 258522</A>: <I><SPAN STYLE=\"word-break: break-all;\"> alright here goes lol. i tryed to solve it and came up with some strange answers. <BR>\n" );
document.write( "1. 4x+2y+z=7<BR>\n" );
document.write( "   2x+2y-4z=-4<BR>\n" );
document.write( "   x+3y-2z=-8\r<BR>\n" );
document.write( "\n" );
document.write( "My attempts: (sorry for the confusing factor x.x)<BR>\n" );
document.write( "(4x+2y+z=7)4<BR>\n" );
document.write( " 2x+2y-4z=28<BR>\n" );
document.write( "_____________<BR>\n" );
document.write( " 2x+2y=-4<BR>\n" );
document.write( " 16x+8y+28<BR>\n" );
document.write( "___________<BR>\n" );
document.write( "18x+10y=24\r<BR>\n" );
document.write( "\n" );
document.write( "(4x+2y+z=7)2<BR>\n" );
document.write( " x+3y-2z=-8<BR>\n" );
document.write( "____________<BR>\n" );
document.write( "8x+4x+2z=7\r<BR>\n" );
document.write( "\n" );
document.write( "(9x+7y=-1)-2<BR>\n" );
document.write( " 18x+10y=24<BR>\n" );
document.write( "____________<BR>\n" );
document.write( "-18x-14y=2<BR>\n" );
document.write( "18x+10y=24<BR>\n" );
document.write( "___________<BR>\n" );
document.write( "-4y = 26<BR>\n" );
document.write( "___   ___<BR>\n" );
document.write( "-4     -4<BR>\n" );
document.write( "y=-6.5\r<BR>\n" );
document.write( "\n" );
document.write( "18x+10(-6.5)=24\r<BR>\n" );
document.write( "\n" );
document.write( "18x-65=24<BR>\n" );
document.write( "__________<BR>\n" );
document.write( "18x=89<BR>\n" );
document.write( "x=4.94\r<BR>\n" );
document.write( "\n" );
document.write( "4(4.94)+2(-6.5)+z=7<BR>\n" );
document.write( "19.70-13+z=7\r<BR>\n" );
document.write( "\n" );
document.write( "6.76+z=7<BR>\n" );
document.write( "z=.24\r<BR>\n" );
document.write( "\n" );
document.write( "thats it. im sorry its so confusing. im so very confused about this stuff so please help x.x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #190326 by </B><A HREF=/tutors/aboutme.mpl?userid=drk><B>drk(1908)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=drk><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=190326\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Lets take this  one step at a time. Here is the original problem:<BR>\n" );
document.write( "(i) 4x+2y+z=7<BR>\n" );
document.write( "(ii) 2x+2y-4z=-4<BR>\n" );
document.write( "(iii) x+3y-2z=-8 <BR>\n" );
document.write( "---<BR>\n" );
document.write( "basically, we want to kill a variable. getting rid of X look pretty easy<BR>\n" );
document.write( "step 1 -> ROW 1 - 2 x ROW 2 AND ROW 2 - 2 x ROW 3 to get<BR>\n" );
document.write( "(iv) -2y + 9z = 15<BR>\n" );
document.write( "(v) -4y = 12<BR>\n" );
document.write( "Luck y us, we can get y right away as<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-3 ALIGN=MIDDLE  ALT=\"y+=+-3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "step 2 -> put the value of y back into (iv) to get y as<BR>\n" );
document.write( "-2(-3) + 9z = 15<BR>\n" );
document.write( "9z = 9<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z=1 ALIGN=MIDDLE  ALT=\"z=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Put the values of z and y into (i) to get x as<BR>\n" );
document.write( "4x + 2(-3) + (1) = 7<BR>\n" );
document.write( "4x -6 + 1 = 7<BR>\n" );
document.write( "4x - 5 = 7<BR>\n" );
document.write( "4x = 12<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+3 ALIGN=MIDDLE  ALT=\"x+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "so (x,y,z) = (3, -3, 1) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );