document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=160337>Question 160337</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do you solve this problem by using elimination? 2x-y=-1<BR>\n" );
document.write( "                                                    3x+2y=30 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #118291 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=118291\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x-y=-1 multiply his equation by 2 & add them.<BR>\n" );
document.write( "3x+2y=30<BR>\n" );
document.write( "4x-2y=-2<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "7x=28<BR>\n" );
document.write( "x=28/7<BR>\n" );
document.write( "x=4 answer.<BR>\n" );
document.write( "2*4-y=-1<BR>\n" );
document.write( "8-y=-1<BR>\n" );
document.write( "-y=-1-8<BR>\n" );
document.write( "-y=-9<BR>\n" );
document.write( "y=9 answer.<BR>\n" );
document.write( "proof:<BR>\n" );
document.write( "3*4+2*9=30<BR>\n" );
document.write( "12+18=30<BR>\n" );
document.write( "30=30 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );