document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=246615>Question 246615</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Y = 2X + 9<BR>\n" );
document.write( "2X - Y = -9 USE SUBSITUTION </SPAN>\n" );
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document.write( "2X - Y = -9 USE SUBSITUTION\r<BR>\n" );
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document.write( "Since Y = 2X +9 in the first equation substitute 2X+9 for Y in the second equation:\r<BR>\n" );
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document.write( "2X-Y = -9<BR>\n" );
document.write( "2X-(2x+9) = -9<BR>\n" );
document.write( "2X-2X-9 = -9<BR>\n" );
document.write( "-9 = -9\r<BR>\n" );
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document.write( "So all values of X and, consequently, Y are solutions to these two equations. <BR>\n" );
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