document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=678572>Question 678572</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do i solve by elimination?\r<BR>\n" );
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document.write( "-x+2y=-10\r<BR>\n" );
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document.write( "5x+4y=8 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #421509 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=421509\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> -x+2y=-10<BR>\n" );
document.write( "5x+4y=8<BR>\n" );
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document.write( "Multiply top equation by -2 and combine with second:<BR>\n" );
document.write( "2x-4y = 20<BR>\n" );
document.write( "5x+4y =  8<BR>\n" );
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document.write( "7x    = 28<BR>\n" );
document.write( "x = 4<BR>\n" );
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document.write( "now, substitute the value found above into either of the two equations to find y:<BR>\n" );
document.write( "5x+4y=8<BR>\n" );
document.write( "5(4)+4y=8<BR>\n" );
document.write( "20+4y=8<BR>\n" );
document.write( "4y=-12<BR>\n" );
document.write( "y = -3<BR>\n" );
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document.write( "answer: x=4 and y=-3 </SPAN>\n" );
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