document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=135049>Question 135049</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve systemes of equation by following the substitution method\r<BR>\n" );
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document.write( "5x-2y=18  2x-y=7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #98877 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=98877\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x-y=7 or -y=-2x+7 or y=2x-7 now substitute (2x-7) for y in the other equation.<BR>\n" );
document.write( "5x-2(2x-7)=18<BR>\n" );
document.write( "5x-4x+14=18<BR>\n" );
document.write( "x=18-14<BR>\n" );
document.write( "x=4 answer.<BR>\n" );
document.write( "y=2*4-7<BR>\n" );
document.write( "y=8-7<BR>\n" );
document.write( "y=1 answer.<BR>\n" );
document.write( "proof:<BR>\n" );
document.write( "5*4-2*1=18<BR>\n" );
document.write( "20-2=18<BR>\n" );
document.write( "18=18<BR>\n" );
document.write( " </SPAN>\n" );
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