document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=840308>Question 840308</A>: <I><SPAN STYLE=\"word-break: break-all;\"> -4x+7y=-5<BR>\n" );
document.write( "x-4y=-1<BR>\n" );
document.write( "solve each system by substitution <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 #506137 by </B><A HREF=/tutors/aboutme.mpl?userid=mxgirl22><B>mxgirl22(39)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mxgirl22><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=mxgirl22><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=506137\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "-4x+7y=-5<BR>\n" );
document.write( "x-4y=-1<BR>\n" );
document.write( "solve each system by substitution\r<BR>\n" );
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document.write( "1.) Note: I'm going to label each equation.\r<BR>\n" );
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document.write( "Equation #1)  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4x%2B7y=-5 ALIGN=MIDDLE  ALT=\"-4x%2B7y=-5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Equation #2)  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4y=-1 ALIGN=MIDDLE  ALT=\"x-4y=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "2.) Get \"x\" by itself in equation #2\r<BR>\n" );
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document.write( "Equation #2)<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4y=-1 ALIGN=MIDDLE  ALT=\"x-4y=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4y%2B4y=-1%2B4y ALIGN=MIDDLE  ALT=\"x-4y%2B4y=-1%2B4y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-1%2B4y ALIGN=MIDDLE  ALT=\"x=-1%2B4y\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "3.) Now that we have \"x\" by itself in equation #2, plug in x=-1+4y into equation #1.\r<BR>\n" );
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document.write( "Equation #1)  <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4x%2B7y=-5 ALIGN=MIDDLE  ALT=\"-4x%2B7y=-5\"   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=-4%28-1%2B4y%29%2B7y=-5 ALIGN=MIDDLE  ALT=\"-4%28-1%2B4y%29%2B7y=-5\"   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=4-16y%2B7y=-5 ALIGN=MIDDLE  ALT=\"4-16y%2B7y=-5\"   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=4-9y=-5 ALIGN=MIDDLE  ALT=\"4-9y=-5\"   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=4-4-9y=-5-4 ALIGN=MIDDLE  ALT=\"4-4-9y=-5-4\"   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=-9y=-9 ALIGN=MIDDLE  ALT=\"-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=-9y%2F-9=-9%2F-9 ALIGN=MIDDLE  ALT=\"-9y%2F-9=-9%2F-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=y=1 ALIGN=MIDDLE  ALT=\"y=1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "4.) Next, use the \"y\" value we found and plug in to either equation #1 or #2 to find \"x\" value.\r<BR>\n" );
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document.write( "Equation #1)  \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4x%2B7y=-5 ALIGN=MIDDLE  ALT=\"-4x%2B7y=-5\"   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=-4x%2B7%281%29=-5 ALIGN=MIDDLE  ALT=\"-4x%2B7%281%29=-5\"   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=-4x%2B7=-5 ALIGN=MIDDLE  ALT=\"-4x%2B7=-5\"   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=-4x%2B7-7=-5-7 ALIGN=MIDDLE  ALT=\"-4x%2B7-7=-5-7\"   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=-4x=-12 ALIGN=MIDDLE  ALT=\"-4x=-12\"   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=-4x%2F-4=-12%2F-4 ALIGN=MIDDLE  ALT=\"-4x%2F-4=-12%2F-4\"   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=3 ALIGN=MIDDLE  ALT=\"x=3\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "5.) Check using x=3 & y=1\r<BR>\n" );
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document.write( "Equation #2)  \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4y=-1 ALIGN=MIDDLE  ALT=\"x-4y=-1\"   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=%283%29-4%281%29=-1 ALIGN=MIDDLE  ALT=\"%283%29-4%281%29=-1\"   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=3-4=-1 ALIGN=MIDDLE  ALT=\"3-4=-1\"   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=-1=-1 ALIGN=MIDDLE  ALT=\"-1=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Checks!\r<BR>\n" );
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document.write( "6.) Answer.\r<BR>\n" );
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document.write( "x=3<BR>\n" );
document.write( "y=1\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );