document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=256255>Question 256255</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Trying to help my child and I do not understand how to solve these problems.<BR>\n" );
document.write( "Equations as follows:\r<BR>\n" );
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document.write( "y= x-1<BR>\n" );
document.write( "y= -x +7\r<BR>\n" );
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document.write( "Can you please show solution with explanation so I understand where the answers (numbers) came from and how these problems are solved?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #188431 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=188431\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> with two equations and two unknowns, there are various methods of solution\r<BR>\n" );
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document.write( "in this case, the easiest is to add the equations\r<BR>\n" );
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document.write( "y= x-1<BR>\n" );
document.write( "y= -x +7<BR>\n" );
document.write( "_________<BR>\n" );
document.write( "2y = 6\r<BR>\n" );
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document.write( "so, y=3 ____ substituting ___ 3 = x-1 ___ so, x=4\r<BR>\n" );
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document.write( "another technique is to substitute at the start ___ in this case, for the y value\r<BR>\n" );
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document.write( "x - 1 = -x + 7 ___ 2x = 8 ___ again, x = 4\r<BR>\n" );
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document.write( "then substitute to find y ___ y = 4 - 1 ___ y = 3\r<BR>\n" );
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document.write( "the choice of the method of solution is usually a combination of the complexity of the problem and personal preference </SPAN>\n" );
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