document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=68747>Question 68747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system by substitution.<BR>\n" );
document.write( "	x + y = 12<BR>\n" );
document.write( "	      y = 2x\r<BR>\n" );
document.write( "\n" );
document.write( "This problem has me a bit confused and need some help. Thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #48944 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=48944\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x + y = 12<BR>\n" );
document.write( "y = 2x <BR>\n" );
document.write( "----------<BR>\n" );
document.write( "You are told that y=2x so substitute \"2x\" in place of \"y\"<BR>\n" );
document.write( "in the 1st equation:<BR>\n" );
document.write( "You get:  x+2x=12<BR>\n" );
document.write( "3x=12<BR>\n" );
document.write( "x=4<BR>\n" );
document.write( "Now you know what \"x\" is.<BR>\n" );
document.write( "Substitute that value of x into the statement \"y=2x\"<BR>\n" );
document.write( "You get y=2(4)=8<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "So the solution for the system of equations is (4,8)<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );