document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=245977>Question 245977</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need some help with a college algebra problem I don't understand,<BR>\n" );
document.write( "It says to solve by the elimination method<BR>\n" );
document.write( "0.3x-0.2y=4<BR>\n" );
document.write( "0.2x+0.5y=-21/23<BR>\n" );
document.write( "It says the solution is an ordered pair and to use integers or fractions for any numbers in the expression, can someone please help me and Thank You </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #179667 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=179667\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> solve by the elimination method<BR>\n" );
document.write( "0.3x-0.2y=4<BR>\n" );
document.write( "0.2x+0.5y=-21/23<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Multiply thru each equation by 1000 to get:<BR>\n" );
document.write( "300x - 200y = 4000<BR>\n" );
document.write( "200x + 500y = -913<BR>\n" );
document.write( "-------------------------<BR>\n" );
document.write( "Let's say you want to eliminate the x-terms:<BR>\n" );
document.write( "Multiply thru the 1st equation by 2<BR>\n" );
document.write( "Multiply thru the 2nd equation by 3<BR>\n" );
document.write( "600x - 400y = 8000<BR>\n" );
document.write( "600x +1500y = -2739<BR>\n" );
document.write( "--------------------<BR>\n" );
document.write( "Subtract the 1st from the 2nd to get:<BR>\n" );
document.write( "1900y = -10,739<BR>\n" );
document.write( "y = -5.65<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "Substitute into 300x - 200y = 4000 to solve for \"x\":<BR>\n" );
document.write( "300x - 200*-5.65 = 4000<BR>\n" );
document.write( "300x = 2870<BR>\n" );
document.write( "x = 9.57<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "These problems are so messy because they assume you<BR>\n" );
document.write( "are using a calculator to do the arithmetic.<BR>\n" );
document.write( "============================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );