document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=511325>Question 511325</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve the system of equations using elimination. x+y= -8, -x+4y= 13 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #342150 by </B><A HREF=/tutors/aboutme.mpl?userid=oberobic><B>oberobic(2304)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oberobic><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=342150\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x +y = -8<BR>\n" );
document.write( "-x + 4y  =13<BR>\n" );
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document.write( "multiply the first equation by 4 and then subtract<BR>\n" );
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document.write( "4x +4y = -32<BR>\n" );
document.write( "-x +4y = 13<BR>\n" );
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document.write( "5x +0y = -45<BR>\n" );
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document.write( "x = -9<BR>\n" );
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document.write( "-(-9) + 4y = 13<BR>\n" );
document.write( "9 + 4y = 13<BR>\n" );
document.write( "4y = 4<BR>\n" );
document.write( "y = 1<BR>\n" );
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document.write( "x + y = ??<BR>\n" );
document.write( "-9 +1 = -8<BR>\n" );
document.write( "correct<BR>\n" );
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document.write( "check<BR>\n" );
document.write( "-x +4y = ??<BR>\n" );
document.write( "-(-9) +4(1) = 9+4 = 13<BR>\n" );
document.write( "correct<BR>\n" );
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document.write( "Answer:  x=-9, y=1<BR>\n" );
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document.write( "Done. </SPAN>\n" );
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