document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=147689>Question 147689</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/1592009425/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> solve using elimination method and check <BR>\n" );
document.write( "15x+3y=-12<BR>\n" );
document.write( "2x+y=8 \r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #108052 by </B><A HREF=/tutors/aboutme.mpl?userid=mangopeeler07><B>mangopeeler07(462)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mangopeeler07><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=108052\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Multiply the second equation by -3 to be able to eliminate y.  You should get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-6x-3y=-24 ALIGN=MIDDLE  ALT=\"-6x-3y=-24\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  Add all that to the first equation and get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9x=-36 ALIGN=MIDDLE  ALT=\"9x=-36\"   DISABLED_style= \"max-width:90%; height:auto;\" >. So x=-4.  So plug that in to the second ORIGINAL equation and get <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%28-4%29%2By=8 ALIGN=MIDDLE  ALT=\"2%28-4%29%2By=8\"   DISABLED_style= \"max-width:90%; height:auto;\" >.  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-8%2By=8 ALIGN=MIDDLE  ALT=\"-8%2By=8\"   DISABLED_style= \"max-width:90%; height:auto;\" >. So y=16.  To check, plug them both in to either equation. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=15%28-4%29%2B3%2816%29=-12 ALIGN=MIDDLE  ALT=\"15%28-4%29%2B3%2816%29=-12\"   DISABLED_style= \"max-width:90%; height:auto;\" >. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-60%2B48=-12 ALIGN=MIDDLE  ALT=\"-60%2B48=-12\"   DISABLED_style= \"max-width:90%; height:auto;\" >. It's true, so x=-4 and y=16. </SPAN>\n" );
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