document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=719830>Question 719830</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you help me solve this equation with substitution\r<BR>\n" );
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document.write( "-5x - 7y = -15<BR>\n" );
document.write( "x + 2y = 6 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #441523 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=441523\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5x+-+7y+=+-15 ALIGN=MIDDLE  ALT=\"-5x+-+7y+=+-15\"   DISABLED_style= \"max-width:90%; height:auto;\" >..eq.1<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+%2B+2y+=+6 ALIGN=MIDDLE  ALT=\"x+%2B+2y+=+6\"   DISABLED_style= \"max-width:90%; height:auto;\" >...eq.2<BR>\n" );
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document.write( "start with <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+%2B+2y+=+6 ALIGN=MIDDLE  ALT=\"x+%2B+2y+=+6\"   DISABLED_style= \"max-width:90%; height:auto;\" >...eq.2 and solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   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=x=+6-2y ALIGN=MIDDLE  ALT=\"x=+6-2y\"   DISABLED_style= \"max-width:90%; height:auto;\" >...eq.2a....substitute in eq.1\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5%286-2y%29+-+7y+=+-15 ALIGN=MIDDLE  ALT=\"-5%286-2y%29+-+7y+=+-15\"   DISABLED_style= \"max-width:90%; height:auto;\" >..eq.1...solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   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=-30%2B10y+-7y+=+-15 ALIGN=MIDDLE  ALT=\"-30%2B10y+-7y+=+-15\"   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=3y+=+-15%2B30 ALIGN=MIDDLE  ALT=\"3y+=+-15%2B30\"   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=3y+=+15 ALIGN=MIDDLE  ALT=\"3y+=+15\"   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=y+=+15%2F3 ALIGN=MIDDLE  ALT=\"y+=+15%2F3\"   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=highlight%28y+=+5%29 ALIGN=MIDDLE  ALT=\"highlight%28y+=+5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >...go back to eq.2a, substitute <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5 ALIGN=MIDDLE  ALT=\"5\"   DISABLED_style= \"max-width:90%; height:auto;\" > for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" > and solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   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=x=+6-2%2A5 ALIGN=MIDDLE  ALT=\"x=+6-2%2A5\"   DISABLED_style= \"max-width:90%; height:auto;\" >...eq.2a\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=+6-10 ALIGN=MIDDLE  ALT=\"x=+6-10\"   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=highlight%28x=+-4%29 ALIGN=MIDDLE  ALT=\"highlight%28x=+-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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