document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=176567>Question 176567</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how can you tell from the equations how many solutions the linear system has?\r<BR>\n" );
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document.write( "2x + y = -1<BR>\n" );
document.write( "-6x - 3y = -15 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #131640 by </B><A HREF=/tutors/aboutme.mpl?userid=Mathtut><B>Mathtut(3670)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Mathtut><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=131640\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> again slope is key ....so lets re-write these equations in slope intercept form which is <BR>\n" );
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document.write( "y=mx+b where m is the slope<BR>\n" );
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document.write( "y=-2x-1<BR>\n" );
document.write( "-3y=6x-15--->divide terms by -3--->y=-2x+5<BR>\n" );
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document.write( "ok in both cases the slope is -2 and it is not the same line(same exact equation) so the lines are parallel.<BR>\n" );
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document.write( "When two lines are parallel there is NO solution. </SPAN>\n" );
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