document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1000000>Question 1000000</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My question is based around 'Solving Systems of Equations by the Substitution Method'. \r<BR>\n" );
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document.write( "I understand the concept of plugging in the x or y value into the one or the other equation but for some (very frustrating) reason whenever I follow these steps I don't come out with the right answer. I will list two below. \r<BR>\n" );
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document.write( "1. 4x-y=-1 <BR>\n" );
document.write( "2x+4y=13\r<BR>\n" );
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document.write( "I chose to take the top equation (4x-y=-1) and make that into -y=-4-1 and change that further by dividing by -y to get y=-4x+1. MY FIRST QUESTION is why did I have to change -1 to +1?\r<BR>\n" );
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document.write( "I then tried to plug y=-4x+1 into the 2x+4y=13 but I never get the right answer! Help?\r<BR>\n" );
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document.write( "2. x-3y=-11<BR>\n" );
document.write( "6x-y=2 \r<BR>\n" );
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document.write( "please help? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #617522 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=617522\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 4x-y=-1 <BR>\n" );
document.write( "subtract 4x from both sides\r<BR>\n" );
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document.write( "4x-4x-y = -1-4x\r<BR>\n" );
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document.write( "-y =-1-4x\r<BR>\n" );
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document.write( "divide by -1\r<BR>\n" );
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document.write( "y=4x+1\r<BR>\n" );
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document.write( "If you observe the original equation\r<BR>\n" );
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document.write( "when you take any term on the other side of the equation the sign changes from + to - OR - to +<BR>\n" );
document.write( "2x+4y = 13\r<BR>\n" );
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document.write( "2x+4(4x+1) =13<BR>\n" );
document.write( "2x+16x+4=13<BR>\n" );
document.write( "18x=13-4  ( The sign of 4 has changed bcause I brought it on the right side)\r<BR>\n" );
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document.write( "18x=9\r<BR>\n" );
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document.write( "/18<BR>\n" );
document.write( "x=9/18<BR>\n" );
document.write( "x=1/2\r<BR>\n" );
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document.write( "plug x\r<BR>\n" );
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document.write( "2x+4y=13<BR>\n" );
document.write( " </SPAN>\n" );
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