document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=970337>Question 970337</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If (2, -1) is a solution to the system of equations, what is the value of b?\r<BR>\n" );
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document.write( "2x+y=a<BR>\n" );
document.write( "3x-y=b </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #592981 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=592981\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 2x+y=a<BR>\n" );
document.write( "3x-y=b<BR>\n" );
document.write( "Add them<BR>\n" );
document.write( "5x=a+b<BR>\n" );
document.write( ";;            10=a+b\r<BR>\n" );
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document.write( "Now multiply top by 3 and bottom by -2<BR>\n" );
document.write( "6x+3y=3a<BR>\n" );
document.write( "-6x+2y=-2b<BR>\n" );
document.write( "5y=3a-2b<BR>\n" );
document.write( ";;           -5=3a-2b\r<BR>\n" );
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document.write( "a+b=10<BR>\n" );
document.write( "3a-2b=-5<BR>\n" );
document.write( "2a+2b=20 ; doubling the first.  Now add<BR>\n" );
document.write( "3a-2b=-5<BR>\n" );
document.write( "5a=15 ; a=3<BR>\n" );
document.write( "a=3, b=7   ANSWER\r<BR>\n" );
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document.write( "2x+y=3<BR>\n" );
document.write( "3x-y=7<BR>\n" );
document.write( "5x=10  x=2  2x+y=3,  4+y=3 ; y=-1  solutions (2,-1) as they should be\r<BR>\n" );
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document.write( " </SPAN>\n" );
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