document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=699628>Question 699628</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i need help to solve this by the substitution method please, can you please show me steps to how you solve this, thank you\r<BR>\n" );
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document.write( "2x-y=5  9x-4y=23 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #431455 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=431455\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  2x - y = 5<BR>\n" );
document.write( " 9x- 4y = 23<BR>\n" );
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document.write( "Use the 1st equation for substitution<BR>\n" );
document.write( "2x - y = 5<BR>\n" );
document.write( "Subtract 2x from both sides<BR>\n" );
document.write( "-y = -2x + 5<BR>\n" );
document.write( "y has to be positive, multiply both sides by -1<BR>\n" );
document.write( "y = 2x - 5<BR>\n" );
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document.write( "In the 2nd equation,<BR>\n" );
document.write( "9x - 4y = 23<BR>\n" );
document.write( " substitute (2x-5) for y<BR>\n" );
document.write( "9x - 4(2x-5) = 23<BR>\n" );
document.write( "9x - 8x + 20 = 23<BR>\n" );
document.write( "subtract 20 from both sides<BR>\n" );
document.write( "x = 23 - 20<BR>\n" );
document.write( "x = 3<BR>\n" );
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document.write( "We know y = 2x -5<BR>\n" );
document.write( "substitute x with 3<BR>\n" );
document.write( "y = 2(3) - 5<BR>\n" );
document.write( "y = 6 - 5<BR>\n" );
document.write( "y = 1<BR>\n" );
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document.write( "Our solution x=3, y=1 should  be checked in both equations<BR>\n" );
document.write( " 2x - y = 5<BR>\n" );
document.write( "replace x and y<BR>\n" );
document.write( "2(3) - 1 = 5<BR>\n" );
document.write( "and<BR>\n" );
document.write( "9x- 4y = 23<BR>\n" );
document.write( "9(3) - 4(1) = 23<BR>\n" );
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document.write( "HOw about this, enough steps for you to understand what happened here? C<BR>\n" );
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