document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=685378>Question 685378</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3a+4b=9<BR>\n" );
document.write( "-3a-2b=-3 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #424526 by </B><A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><B>ReadingBoosters(3246)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ReadingBoosters><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=424526\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When the variable is the same in two equation but one is negative, add them together.<BR>\n" );
document.write( "3a + -3a + 4b + -2b = 9 + -3 ==> the a variable will cancel, solve for b<BR>\n" );
document.write( "2b= 6 ==> divide both sides by 2<BR>\n" );
document.write( "b = 3<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Substitute the value of b into either equation and solve for a<BR>\n" );
document.write( "3a + 4(3) = 9<BR>\n" );
document.write( "3a + 12 = 9 ==> isolate the a variable<BR>\n" );
document.write( "3a = 9 - 12<BR>\n" );
document.write( "3a = -3 ==> divide both sides by 3<BR>\n" );
document.write( "a = -1<BR>\n" );
document.write( "...<BR>\n" );
document.write( "Solutions<BR>\n" );
document.write( "a=-1, b=3<BR>\n" );
document.write( "..............................<BR>\n" );
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