document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=728743>Question 728743</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When do you use substitution ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #445577 by </B><A HREF=/tutors/aboutme.mpl?userid=dr8><B>dr8(3)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dr8><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=dr8><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=445577\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You would use the substitution method if you have an equation like the following:<BR>\n" );
document.write( "x + 10 = 15<BR>\n" );
document.write( "3x + 4y = 22\r<BR>\n" );
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document.write( "Since there is only one variable in the first equation, you would find x. After finding x, you would <u>substitute</u> x in the second equation. Now you should have one variable in the second equation, and are able to find the answer to the equation. </SPAN>\n" );
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