document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=69915>Question 69915</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am confused on how to solve systems using equations.<BR>\n" );
document.write( "here is the problem: \r<BR>\n" );
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document.write( "x-2y=-8<BR>\n" );
document.write( "y= -x - 2\r<BR>\n" );
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document.write( "so far i have tried this:<BR>\n" );
document.write( "x+-2y=-8<BR>\n" );
document.write( "  -2  -2\r<BR>\n" );
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document.write( "x=8-2y<BR>\n" );
document.write( "2y=-8 +2<BR>\n" );
document.write( "i am confused on what i am doing wrong.<BR>\n" );
document.write( "can you help?\r<BR>\n" );
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document.write( "thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #49827 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=49827\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I'm not sure I'm reading your notation right, but I'll see what you're doing wrong. You have 2 equations x-2y=-8 and y= -x - 2 given to you, so you can use one equation to solve for another. For instance, since y=-x-2 you can substitute that y value for the y value in the first equation<BR>\n" );
document.write( "Equation 1<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-2y=-8 ALIGN=MIDDLE  ALT=\"x-2y=-8\"   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=y=+-x+-+2 ALIGN=MIDDLE  ALT=\"y=+-x+-+2\"   DISABLED_style= \"max-width:90%; height:auto;\" >Plug this y into the y of the first equation<BR>\n" );
document.write( "Equation 1<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-2%2A%28highlight%28-x+-+2%29%29=-8 ALIGN=MIDDLE  ALT=\"x-2%2A%28highlight%28-x+-+2%29%29=-8\"   DISABLED_style= \"max-width:90%; height:auto;\" > The red box is where the y was originally<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-2%28-x+-+2%29=-8 ALIGN=MIDDLE  ALT=\"x-2%28-x+-+2%29=-8\"   DISABLED_style= \"max-width:90%; height:auto;\" > Solve for x<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B2x%2B4=-8 ALIGN=MIDDLE  ALT=\"x%2B2x%2B4=-8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3x%2B4=-8 ALIGN=MIDDLE  ALT=\"3x%2B4=-8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3x=-12 ALIGN=MIDDLE  ALT=\"3x=-12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-4 ALIGN=MIDDLE  ALT=\"x=-4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use this x value to solve for y<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-x-2 ALIGN=MIDDLE  ALT=\"y=-x-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=-%28-4%29-2 ALIGN=MIDDLE  ALT=\"y=-%28-4%29-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=4-2 ALIGN=MIDDLE  ALT=\"y=4-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=2 ALIGN=MIDDLE  ALT=\"y=2\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );