document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=612880>Question 612880</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 	Solve using the substitution method:<BR>\n" );
document.write( "r=-3s<BR>\n" );
document.write( "r+4s=10<BR>\n" );
document.write( "and please explain </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #385802 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=385802\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Solve using the substitution method:<BR>\n" );
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document.write( "r = -3s; use this for substitution in the 2nd equation<BR>\n" );
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document.write( "r + 4s = 10<BR>\n" );
document.write( "substitute -3s for r, then solve for s<BR>\n" );
document.write( "-3s + 4s = 10<BR>\n" );
document.write( "s = 10<BR>\n" );
document.write( "find r using the 1st equation<BR>\n" );
document.write( "r = -3s<BR>\n" );
document.write( "substitute 10 for s<BR>\n" );
document.write( "r = -3(10)<BR>\n" );
document.write( "r = -30<BR>\n" );
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document.write( "The solutions: r = -30, s = 10<BR>\n" );
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document.write( "Confirm this in the 2nd equation<BR>\n" );
document.write( "r + 4s = 10<BR>\n" );
document.write( "substitute for r and s<BR>\n" );
document.write( "-30 + 4(10) = <BR>\n" );
document.write( "-30 + 40 = 10; confirms our solutions </SPAN>\n" );
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