document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=154843>Question 154843</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395977223/algebrahomeworkh>Algebra structure and method book 1</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> can you please help me solve by the addition-or-subtraction method: (((12a-5b=18 15a-5b=30))) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #114001 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=114001\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 12a-5b=18 <BR>\n" );
document.write( "15a-5b=30 SUBTRACT <BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "-3A=-12<BR>\n" );
document.write( "A=-12/-3<BR>\n" );
document.write( "A=4 ANSWER.<BR>\n" );
document.write( "12*4-5B=18<BR>\n" );
document.write( "48-5B=18<BR>\n" );
document.write( "-5B=18-48<BR>\n" );
document.write( "-5B=-30<BR>\n" );
document.write( "B=-30/-5<BR>\n" );
document.write( "B=6 ANSWER.<BR>\n" );
document.write( "PROOF:<BR>\n" );
document.write( "15*4-5*6=30<BR>\n" );
document.write( "60-30=30<BR>\n" );
document.write( "30=30\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );