document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=181745>Question 181745</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Method Substitution<BR>\n" );
document.write( "12. Explain why the following linear system is not easy to solve by substitution. <BR>\n" );
document.write( "3x+4y=10<BR>\n" );
document.write( "2x-5y=9<BR>\n" );
document.write( "Thank you very much and i need it today. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #136498 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=136498\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3x+4y=10<BR>\n" );
document.write( "3x=10-4y<BR>\n" );
document.write( "x=(10-4y)/3<BR>\n" );
document.write( "2x-5y=9<BR>\n" );
document.write( "2(10-4y)/3-5y=9<BR>\n" );
document.write( "(20-8y)/3-5y=9<BR>\n" );
document.write( "(20-8y)/3=9+5y<BR>\n" );
document.write( "20-8y=3(9+5y)<BR>\n" );
document.write( "20-8y=27+15y<BR>\n" );
document.write( "-8y-15y=27-20<BR>\n" );
document.write( "-23y=7<BR>\n" );
document.write( "y=7/-23<BR>\n" );
document.write( "y=-7/23 ans.<BR>\n" );
document.write( "2x-5(-7/23)=9<BR>\n" );
document.write( "2x+35/23=9<BR>\n" );
document.write( "2x=9-35/23<BR>\n" );
document.write( "2x=172/23<BR>\n" );
document.write( "x=172/23*1/2<BR>\n" );
document.write( "x=172/46<BR>\n" );
document.write( "x=86/23 ans.<BR>\n" );
document.write( "Substitution sometimes create complex fractions which makes the process very difficult. </SPAN>\n" );
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