document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1155559>Question 1155559</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solving:\r<BR>\n" );
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document.write( "      5 x-3y = 18 <BR>\n" );
document.write( "      -3 x-3y = -12 \r<BR>\n" );
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document.write( "Using Substitution Method.\r<BR>\n" );
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document.write( "Expressing x as a function of y (from the first equation) x = (18  +3y)/5\r<BR>\n" );
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document.write( "Substituting this expression into the second equation:\r<BR>\n" );
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document.write( "	-3 (18 -3y)/5-3y = -12 \r<BR>\n" );
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document.write( "Why is this not -3(18+3y)/5-3y = -12 ?<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 #778200 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10552)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=778200\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "Solving:\r<BR>\n" );
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document.write( "      5 x-3y = 18 <BR>\n" );
document.write( "      -3 x-3y = -12 \r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Using Substitution Method.\r<BR>\n" );
document.write( "\n" );
document.write( "Expressing x as a function of y (from the first equation) x = (18  +3y)/5\r<BR>\n" );
document.write( "\n" );
document.write( "Substituting this expression into the second equation:\r<BR>\n" );
document.write( "\n" );
document.write( "	-3 (18 -3y)/5-3y = -12 \r<BR>\n" );
document.write( "\n" );
document.write( "Why is this not -3(18+3y)/5-3y = -12?<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">Looking at the 2 equations, you'll notice that they both have - 3y. <BR>\n" );
document.write( "5x - 3y = 18_____- 3y = 18 - 5x ----- Solving for - 3y ----- eq (i)<BR>\n" );
document.write( "- 3x - 3y = - 12 ----- eq (ii)<BR>\n" );
document.write( "- 3x + 18 - 5x = - 12 ---- Substituting 18 - 5x for - 3y in eq (ii)<BR>\n" );
document.write( "- 3x - 5x = - 12 - 18<BR>\n" );
document.write( "- 8x = - 30<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28matrix%281%2C7%2C+x%2C+%22=%22%2C+%28-+30%29%2F%28-+8%29%2C+%22=%22%2C+15%2F4%2C+or%2C+3.75%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Now, substitute <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=matrix%281%2C3%2C+15%2F4%2C+or%2C+3.75%29 ALIGN=MIDDLE  ALT=\"matrix%281%2C3%2C+15%2F4%2C+or%2C+3.75%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > for x in eq (i) to find the value of y. </SPAN>\n" );
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