document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=119635>Question 119635</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i dont know how to do substitution algebra tiles! I'm extremely confused on HOW to solve substitutions. Please help me I'm having a hard time!\r<BR>\n" );
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document.write( "1.  y= 2X<BR>\n" );
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document.write( "    3X+y= 10\r<BR>\n" );
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document.write( "I'd REALLY appreciate the help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #87644 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=87644\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> when you use substitution, you SUBSTITUTE the value of one unknown in terms of another unknown\r<BR>\n" );
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document.write( "the first equation tells you that y and 2X are the same (equal)\r<BR>\n" );
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document.write( "when you go to the second equation, you SUBSTITUTE 2X in place of y __ 3X+(2X)=10\r<BR>\n" );
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document.write( "so 5X=10, and X=2\r<BR>\n" );
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document.write( "now, you can go to any equation that has X and y<BR>\n" );
document.write( "___ and SUBSTITUTE 2 for X to find y\r<BR>\n" );
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document.write( "y=2X __ y=2(2) __ y=4 </SPAN>\n" );
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