document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=477473>Question 477473</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve each system of equations by using substitution.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8x+%2B+9y+=+9+ ALIGN=MIDDLE  ALT=\"+8x+%2B+9y+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3x+-+5y+=+20+ ALIGN=MIDDLE  ALT=\"+3x+-+5y+=+20+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "I've multiplied the bottom equation by 3 and got 9x - 15y = 60, but it isn't going to be correct because 8x - 9x = -x so the x hasn't been eliminated. I don't know what to do about it. The rest of the problem made no sense because the numbers were too high after I plugged them in. I got -x + -6 = -51 then divided that by -6 which got me 8.5. I didn't know what to do with the -x so I just ignored it bu I don't think that's right. Any solutions? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #327246 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=327246\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve each system of equations by using substitution.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8x+%2B+9y+=+9+ ALIGN=MIDDLE  ALT=\"+8x+%2B+9y+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+3x+-+5y+=+20+ ALIGN=MIDDLE  ALT=\"+3x+-+5y+=+20+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "You have to solve one of the eqns for x or y, then sub into the other eqn.<BR>\n" );
document.write( "Substitution is not the best method for these 2, but sometimes you don't get to choose.<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+%285y+%2B+20%29%2F3+ ALIGN=MIDDLE  ALT=\"+x+=+%285y+%2B+20%29%2F3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8x+%2B+9y+=+9+ ALIGN=MIDDLE  ALT=\"+8x+%2B+9y+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+8%285y%2B20%29%2F3+%2B+9y+=+9+ ALIGN=MIDDLE  ALT=\"+8%285y%2B20%29%2F3+%2B+9y+=+9+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Multiply by 3 to eliminate fractions<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+40y+%2B+160+%2B+27y+=+27+ ALIGN=MIDDLE  ALT=\"+40y+%2B+160+%2B+27y+=+27+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "67y = -133<BR>\n" );
document.write( "y = -133/67<BR>\n" );
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document.write( "Sub for y in either eqn and find x<BR>\n" );
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document.write( "x = (-665/67 + 1340/67)/3<BR>\n" );
document.write( "x = 225/67<BR>\n" );
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