document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=625825>Question 625825</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A) 7a+3z=12\r<BR>\n" );
document.write( "\n" );
document.write( "B) 3a+7z=6\r<BR>\n" );
document.write( "\n" );
document.write( "Given the formulas above, what is the value of a-z? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #393807 by </B><A HREF=/tutors/aboutme.mpl?userid=nvegupta><B>nvegupta(2)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nvegupta><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=393807\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 7a+3z=12<BR>\n" );
document.write( "7a=12-3z<BR>\n" );
document.write( "a=(12-3z)/7\r<BR>\n" );
document.write( "\n" );
document.write( "3a+7z=6<BR>\n" );
document.write( "3a=6-7z<BR>\n" );
document.write( "a=(6-7z)/3\r<BR>\n" );
document.write( "\n" );
document.write( "a=a<BR>\n" );
document.write( "(12-3z)/7=(6-7z)/3<BR>\n" );
document.write( "3(12-3z)=7(6-7z)<BR>\n" );
document.write( "36-9z=42-49z<BR>\n" );
document.write( "-9z+49z=42-36<BR>\n" );
document.write( "40z=6<BR>\n" );
document.write( "z=6/40<BR>\n" );
document.write( "z=3/20\r<BR>\n" );
document.write( "\n" );
document.write( "PUT VALUE OF z IN ANY SUITABLE EQUATION TO FIND VALUE OF a.\r<BR>\n" );
document.write( "\n" );
document.write( "7a+3z=12<BR>\n" );
document.write( "7a+3*3/20=12<BR>\n" );
document.write( "7a+9/20=12<BR>\n" );
document.write( "7a=12-9/20<BR>\n" );
document.write( "7a=231/20<BR>\n" );
document.write( "a=(231/20)/7<BR>\n" );
document.write( "a=231/140\r<BR>\n" );
document.write( "\n" );
document.write( "a-z<BR>\n" );
document.write( "=(231/140)-(3/20)<BR>\n" );
document.write( "=210/140<BR>\n" );
document.write( "=21/14<BR>\n" );
document.write( "=3/2 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );