document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=433873>Question 433873</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I DONT UNDERSTAND THIS PLEASE HELP..!\r<BR>\n" );
document.write( "\n" );
document.write( "Use Cramer’s rule to solve for y in the following system of equations.\r<BR>\n" );
document.write( "\n" );
document.write( "    x + 4y – 2z = 3<BR>\n" );
document.write( "    x + 3y + 7z = 1<BR>\n" );
document.write( "    2x + 9y + z = 8 <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #300718 by </B><A HREF=/tutors/aboutme.mpl?userid=tlwright><B>tlwright(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tlwright><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=300718\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve using Cramer's Rule:\r<BR>\n" );
document.write( "\n" );
document.write( " <BR>\n" );
document.write( "x + 4y – 2z = 3<BR>\n" );
document.write( "x + 3y + 7z = 1<BR>\n" );
document.write( "2x + 9y + z = 8 \r<BR>\n" );
document.write( "\n" );
document.write( "Step 1, calculate the denominator Delta (&#916;):\r<BR>\n" );
document.write( "\n" );
document.write( "&#916; = (1 * 3 * 1) + (4 * 7 * 2) + (-2 * 1 * 9) - (-2 * 3 * 2) - (1 * 7 * 9) - (4 * 1 * 1)<BR>\n" );
document.write( "&#916; = 3 + 56 - 18 + 12 - 63 - 4<BR>\n" );
document.write( "&#916; = -14\r<BR>\n" );
document.write( "\n" );
document.write( "Step 2, calculate the x numerator:\r<BR>\n" );
document.write( "\n" );
document.write( "x numerator = (3 * 3 * 1) + (4 * 7 * 8) + (-2 * 1 * 9) - (-2 * 3 * 8) - (3 * 7 * 9) - (4 * 1 * 1)<BR>\n" );
document.write( "x numerator = 9 + 224 - 18 + 48 - 189 - 4<BR>\n" );
document.write( "x numerator = 70\r<BR>\n" );
document.write( "\n" );
document.write( "Step 3, calculate the y numerator:\r<BR>\n" );
document.write( "\n" );
document.write( "y numerator = (1 * 1 * 1) + (3 * 7 * 2) + (-2 * 1 * 8) - (-2 * 1 * 2) - (1 * 7 * 8) - (3 * 1 * 1)<BR>\n" );
document.write( "y numerator = 1 + 42 - 16 + 4 - 56 - 3<BR>\n" );
document.write( "y numerator = -28\r<BR>\n" );
document.write( "\n" );
document.write( "Step 4, calculate the z numerator:\r<BR>\n" );
document.write( "\n" );
document.write( "(1 * 3 * 8) + (4 * 1 * 2) + (3 * 1 * 9) - (3 * 3 * 2) - (1 * 1 * 9) - (4 * 1 * 8)<BR>\n" );
document.write( "z numerator = 24 + 8 + 27 - 18 - 9 - 32<BR>\n" );
document.write( "z numerator = 0\r<BR>\n" );
document.write( "\n" );
document.write( "Calculate X<BR>\n" );
document.write( "x  =  	x numerator	<BR>\n" );
document.write( "  	&#916;\r<BR>\n" );
document.write( "\n" );
document.write( "x  =  	70	<BR>\n" );
document.write( "  	-14\r<BR>\n" );
document.write( "\n" );
document.write( "X = -5\r<BR>\n" );
document.write( "\n" );
document.write( "Calculate Y<BR>\n" );
document.write( "y  =  	y numerator	<BR>\n" );
document.write( "  	&#916;\r<BR>\n" );
document.write( "\n" );
document.write( "y  =  	-28	<BR>\n" );
document.write( "  	-14\r<BR>\n" );
document.write( "\n" );
document.write( "Y = 2\r<BR>\n" );
document.write( "\n" );
document.write( "Calculate Z<BR>\n" );
document.write( "z  =  	z numerator	<BR>\n" );
document.write( "  	&#916;\r<BR>\n" );
document.write( "\n" );
document.write( "z  =  	0	<BR>\n" );
document.write( "  	-14\r<BR>\n" );
document.write( "\n" );
document.write( "Z = 0<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );