document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=792436>Question 792436</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help solving this problem:\r<BR>\n" );
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document.write( "Find all solutions of the given system of equations and check your answer graphically.  If the system is dependent, express your answer in terms of x, where y = y(x).)<BR>\n" );
document.write( "x - y = 0<BR>\n" );
document.write( "x + y = -46<BR>\n" );
document.write( "(x, y) = ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #480016 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=480016\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28x-y=0%2Cx%2By=-46%29 ALIGN=MIDDLE  ALT=\"system%28x-y=0%2Cx%2By=-46%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-y=0 ALIGN=MIDDLE  ALT=\"x-y=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >--><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x ALIGN=MIDDLE  ALT=\"y=x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Substituting into <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2By=-46 ALIGN=MIDDLE  ALT=\"x%2By=-46\"   DISABLED_style= \"max-width:90%; height:auto;\" > we get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2Bx=-46 ALIGN=MIDDLE  ALT=\"x%2Bx=-46\"   DISABLED_style= \"max-width:90%; height:auto;\" >--><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x=-46 ALIGN=MIDDLE  ALT=\"2x=-46\"   DISABLED_style= \"max-width:90%; height:auto;\" >--><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-46%2F2 ALIGN=MIDDLE  ALT=\"x=-46%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >--><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=highlight%28-23%29 ALIGN=MIDDLE  ALT=\"x=highlight%28-23%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and,<BR>\n" );
document.write( "since <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x ALIGN=MIDDLE  ALT=\"y=x\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=highlight%28-23%29 ALIGN=MIDDLE  ALT=\"y=highlight%28-23%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "The graph would be a good check when done on graph paper, but it will not look very informative here.<BR>\n" );
document.write( "To graph each line, you need to calculate the coordinates for two points, plot those points, and connect them with a straight line.<BR>\n" );
document.write( "The line <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x ALIGN=MIDDLE  ALT=\"y=x\"   DISABLED_style= \"max-width:90%; height:auto;\" > is obviously the line going through (-30,-30) and (0,0).<BR>\n" );
document.write( "The line <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2Bx=-46 ALIGN=MIDDLE  ALT=\"x%2Bx=-46\"   DISABLED_style= \"max-width:90%; height:auto;\" > obviously passes through (-46,0) and (0,-46).<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28600%2C600%2C-51%2C9%2C-51%2C9%2C%0D%0Agrid%281%29%2C%0D%0Ablue%28circle%28-46%2C0%2C0.5%29%29%2Cblue%28circle%280%2C-46%2C0.5%29%29%2C%0D%0Agreen%28circle%280%2C0%2C0.5%29%29%2Cgreen%28circle%28-30%2C-30%2C0.5%29%29%2C%0D%0Ablue%28line%28-51%2C5%2C5%2C-51%29%29%2Cgreen%28line%28-50%2C-50%2C10%2C10%29%29%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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