document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=323010>Question 323010</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3r-5s=21<BR>\n" );
document.write( "5r+3s=33<BR>\n" );
document.write( "solve by elimination method </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #231241 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=231241\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3r-5s=21<BR>\n" );
document.write( "5r+3s=33<BR>\n" );
document.write( "solve by elimination method<BR>\n" );
document.write( "-------------------<BR>\n" );
document.write( "Multiply 1st by 5<BR>\n" );
document.write( "Multiply 2nd by 3<BR>\n" );
document.write( "-----------<BR>\n" );
document.write( "15r - 25s = 105<BR>\n" );
document.write( "15r + 9s  = 99<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "Subtract 1st from 2nd to get:<BR>\n" );
document.write( "34s = -6<BR>\n" );
document.write( "s = -3/17<BR>\n" );
document.write( "==================<BR>\n" );
document.write( "Substitute into 3r-5s = 21 to solve for r:<BR>\n" );
document.write( "3r -5(-3/17) = 21<BR>\n" );
document.write( "3r = 21 -15/17<BR>\n" );
document.write( "r = 7 - 5/17<BR>\n" );
document.write( "r = 114/17<BR>\n" );
document.write( "===================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );