document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=321983>Question 321983</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 7m+n=30<BR>\n" );
document.write( "m-3n=20<BR>\n" );
document.write( "solve by elimination method </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #230527 by </B><A HREF=/tutors/aboutme.mpl?userid=Jk22><B>Jk22(389)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Jk22><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=Jk22><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=230527\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) 7m+n=30<BR>\n" );
document.write( "2) m-3n=20\r<BR>\n" );
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document.write( "2)=> m=20+3n\r<BR>\n" );
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document.write( "eliminate m in (1) : 7(20+3n)+n=140+21n+n=140+22n=30\r<BR>\n" );
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document.write( "=> 22n=-110 => n=-5<BR>\n" );
document.write( "=> m=20-15=(30+5)/7=5 </SPAN>\n" );
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