document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=200850>Question 200850</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If 4a+3b=27 and 3a+4b=29, then 7a+7b/2=? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #151075 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=151075\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (1)  4a +3b =27<BR>\n" );
document.write( "(2) 3a +4b = 29<BR>\n" );
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document.write( "multiply  (1) by 3,,,,and  (2) by 4<BR>\n" );
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document.write( "(3) 12a +9b = 81<BR>\n" );
document.write( "(4) 12a +16b = 116<BR>\n" );
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document.write( "(4) - (3) <BR>\n" );
document.write( "7b = 35<BR>\n" );
document.write( "b=5<BR>\n" );
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document.write( "subst  into (1)<BR>\n" );
document.write( "4a +3(5) = 27<BR>\n" );
document.write( "4a =12<BR>\n" );
document.write( "a=3<BR>\n" );
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document.write( "check<BR>\n" );
document.write( "(1) 4(3) +3(5) = 27,,,,,12 +15 =27 ,,,,,,ok<BR>\n" );
document.write( "(2) 3(3) +4(5) =29,,,,9+20=29,,,,,,,ok<BR>\n" );
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document.write( "subst  into  7a + 7b/2 = 7(3) +7(5) /2 = 21 + 35/2 = 38.5<BR>\n" );
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document.write( "or  subst (7a +7b )/2 = (7*3 +7*5)/2= 56 /2 =28 </SPAN>\n" );
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