document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=235939>Question 235939</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solving systems of equations. Solve the system: 2x+y=1 and 5x-y=20. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #173806 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=173806\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x+y=1 <BR>\n" );
document.write( "5x-y=20 add <BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "7x=21<BR>\n" );
document.write( "x=21/7<BR>\n" );
document.write( "x=3 ans<BR>\n" );
document.write( "2*3+y=1<BR>\n" );
document.write( "6+y=1`<BR>\n" );
document.write( "y=1-6<BR>\n" );
document.write( "y=-5 ans.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "5*3-(-5)=20<BR>\n" );
document.write( "15+5=20<BR>\n" );
document.write( "20=20 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );