document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=202625>Question 202625</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve problems.<BR>\n" );
document.write( "Solve by the elimination method.\r<BR>\n" );
document.write( "\n" );
document.write( "4x+3y=-12<BR>\n" );
document.write( "9x-3y=-105<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "12x+9y=-36<BR>\n" );
document.write( "27x-9y=-315<BR>\n" );
document.write( "   39x=351<BR>\n" );
document.write( "x=351/39<BR>\n" );
document.write( "y=?<BR>\n" );
document.write( "--------------<BR>\n" );
document.write( "Solve by the elimination method.<BR>\n" );
document.write( "4x-8y=5<BR>\n" );
document.write( "4x-8y=6<BR>\n" );
document.write( "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 #152819 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=152819\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve by the elimination method. <BR>\n" );
document.write( "4x+3y=-12<BR>\n" );
document.write( "9x-3y=-105<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Add the two equations to get:<BR>\n" );
document.write( "13x = -117<BR>\n" );
document.write( "x = 9<BR>\n" );
document.write( "Substitute into 4x+3y=-12 to solve for \"y\":<BR>\n" );
document.write( "4*9 + 3y = -12<BR>\n" );
document.write( "3y = -12-36<BR>\n" );
document.write( "y = -16\r<BR>\n" );
document.write( "\n" );
document.write( "------------<BR>\n" );
document.write( "12x+9y=-36<BR>\n" );
document.write( "27x-9y=-315<BR>\n" );
document.write( "39x=351<BR>\n" );
document.write( "x=351/39<BR>\n" );
document.write( "y=9<BR>\n" );
document.write( "Substitute into 12x+9y = -36 to solve for \"x\":<BR>\n" );
document.write( "12x + 9*9 = -36<BR>\n" );
document.write( "12x = -127/12\r<BR>\n" );
document.write( "\n" );
document.write( "--------------<BR>\n" );
document.write( "Solve by the elimination method.<BR>\n" );
document.write( "4x-8y=5<BR>\n" );
document.write( "4x-8y=6<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Subtract to get:<BR>\n" );
document.write( "0 = 1<BR>\n" );
document.write( "This is a contradiction.<BR>\n" );
document.write( "There is no solution.<BR>\n" );
document.write( "====================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );