document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=159253>Question 159253</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0030700442/algebrahomeworkh>Holt Algebra 2</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> 3t - r = 9<BR>\n" );
document.write( "r = 2t + 8\r<BR>\n" );
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document.write( "i am a parent trying to show my child how to do this and i need to know how to do it step by step. i can look at it and figure out some of it but need to know what to do first, second, etc. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #117408 by </B><A HREF=/tutors/aboutme.mpl?userid=t_as87><B>t_as87(5)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=t_as87><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=117408\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 3t - r = 9<BR>\n" );
document.write( "r = 2t + 8 \r<BR>\n" );
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document.write( "You have 2 equations, with 2 unknowns r and t...<BR>\n" );
document.write( "the second equation can be used to substitute the value of r in the first equation, so we get a new equation with the form:<BR>\n" );
document.write( "3t - (2t + 8) = 9<BR>\n" );
document.write( "Now we can solve for t<BR>\n" );
document.write( "t - 8 = 9<BR>\n" );
document.write( "t = 17\r<BR>\n" );
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document.write( "We now know what the value of t is. We can substitute this value in the second equation to get a value for r<BR>\n" );
document.write( "r = 2(17) + 8<BR>\n" );
document.write( "so r = 42\r<BR>\n" );
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document.write( "t = 17, r = 42 </SPAN>\n" );
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