document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=309631>Question 309631</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having trouble with this equation,\r<BR>\n" );
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document.write( "8x-9y=8.5<BR>\n" );
document.write( "7y-2x=-45<BR>\n" );
document.write( "solve using the elimination method.<BR>\n" );
document.write( "Can you explain how to do this? (In layman's terms) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #221449 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=221449\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 8x-9y=8.5<BR>\n" );
document.write( "7y-2x=-45<BR>\n" );
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document.write( "Rearrange:<BR>\n" );
document.write( "8x-9y = 8.5<BR>\n" );
document.write( "-2x+7y = -45<BR>\n" );
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document.write( "Let's say you want to eliminate the x-terms.<BR>\n" );
document.write( "Multiply thru the 2nd equation by 4 to get:<BR>\n" );
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document.write( "8x-9y = 8.5<BR>\n" );
document.write( "-8x+28y = 4*-45<BR>\n" );
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document.write( "Add the two equations:<BR>\n" );
document.write( "19y = -171.5<BR>\n" );
document.write( "y = -9.0263<BR>\n" );
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document.write( "Substitute that into either of the original equations and solve for \"x\":<BR>\n" );
document.write( "7y-2x = -45<BR>\n" );
document.write( "7y - 2(-9.0263) = -45<BR>\n" );
document.write( "7y = -63.0526<BR>\n" );
document.write( "y = -9.0075<BR>\n" );
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document.write( "You could check the answers in the other original equation.<BR>\n" );
document.write( "You have to realize some accuracy is lost because the decimal<BR>\n" );
document.write( "results were rounded.<BR>\n" );
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document.write( "8x-9y=8.5<BR>\n" );
document.write( "8*-9.0263 -9(-9.0075) =8.5<BR>\n" );
document.write( "8.8571 is close to 8.5<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.  </SPAN>\n" );
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