document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=838687>Question 838687</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A linear system is given.\r<BR>\n" );
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document.write( "y= 1/5x - 3   line 1<BR>\n" );
document.write( "y= -2/7x +1   line 2\r<BR>\n" );
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document.write( "a) Explain why the following is an equivalent linear system.<BR>\n" );
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document.write( "   x-5y=15    line 3<BR>\n" );
document.write( "   2x+7y=7    line 4\r<BR>\n" );
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document.write( "b) If you graph all four lines, what results do you expect? Graph to check.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #505220 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=505220\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A linear system is given.\r<BR>\n" );
document.write( "\n" );
document.write( "y= 1/5x - 3   line 1<BR>\n" );
document.write( "y= -2/7x +1   line 2\r<BR>\n" );
document.write( "\n" );
document.write( "a) Explain why the following is an equivalent linear system.<BR>\n" );
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document.write( "y= 1/5x - 3   line 1<BR>\n" );
document.write( "Multiply by 5<BR>\n" );
document.write( "5y = x - 15<BR>\n" );
document.write( "Subtract 5y<BR>\n" );
document.write( "0 = x - 5y - 15<BR>\n" );
document.write( "Add 15<BR>\n" );
document.write( "x - 5y = 15  which is line 3 below.<BR>\n" );
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document.write( "Line 2 is the same as line 4.<BR>\n" );
document.write( "   <BR>\n" );
document.write( "   x-5y=15    line 3<BR>\n" );
document.write( "   2x+7y=7    line 4\r<BR>\n" );
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document.write( "b) If you graph all four lines, what results do you expect? Graph to check. <BR>\n" );
document.write( "You get the same 2 lines twice. </SPAN>\n" );
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