document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=593819>Question 593819</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2x-3y=-2<BR>\n" );
document.write( "4x+y=24\r<BR>\n" );
document.write( "\n" );
document.write( "This is elimination method im practicing for exam .When do we add and subtract when dealing with the elimnation method?They say when its the same you subtract and when it is different you add can someone give me and example of what this means i dont understand.. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #376469 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=376469\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the object is to eliminate one of the variables by combining the equations\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "the absolute value (number) of the coefficients of the variable must be equal<BR>\n" );
document.write( "___ if the coefficients have the SAME sign, then you subtract to eliminate the variable<BR>\n" );
document.write( "___ if the signs are DIFFERENT, adding the equations will eliminate the variable\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "looking at your example; multiplying the 1st equation by 2 makes the x-coefficients in the two equations the SAME<BR>\n" );
document.write( "___ subtracting the equations eliminates the x-terms and gives ___ -7y = -28\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "another solution; multiplying the 2nd equation by 3 makes the numbers of the y-coefficients equal with DIFFERENT signs<BR>\n" );
document.write( "___ adding the equations eliminates the y-terms and gives ___ 14x = 70\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "sometimes, you may have to multiply both equations by different numbers to get a set of coefficients to \"match up\" </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );