document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=290561>Question 290561</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I trying to learn elimination and substitution<BR>\n" );
document.write( "my problem is \r<BR>\n" );
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document.write( "(3x + 3y = -1<BR>\n" );
document.write( " 2x - 2y = 5  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #210267 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=210267\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Elimination method:<BR>\n" );
document.write( "3x+3y=-1 multiply this equation by 2.<BR>\n" );
document.write( "2x-2y=5  multiply this equation by 3 & add.<BR>\n" );
document.write( "6x+6y=-2<BR>\n" );
document.write( "6x-6y=15<BR>\n" );
document.write( "------------<BR>\n" );
document.write( "12x=13<BR>\n" );
document.write( "x=13/12 ans.<BR>\n" );
document.write( "3*13/12+3y=-1<BR>\n" );
document.write( "39/12+3y=-1<BR>\n" );
document.write( "3y=-1-39/12<BR>\n" );
document.write( "3y=-1-13/4<BR>\n" );
document.write( "3y=-4/4-13/4<BR>\n" );
document.write( "3y=-17/4<BR>\n" );
document.write( "y=(-17/4)/3<BR>\n" );
document.write( "y=-17/4*1/3<BR>\n" );
document.write( "y=-17/12 ans.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "2(13/12)-2(-17/12)=5<BR>\n" );
document.write( "26/12+34/12=5<BR>\n" );
document.write( "60/12=5<BR>\n" );
document.write( "5=5\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );