document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=42961>Question 42961</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I GOT HOMEWORK FROM ALGEBRA BUT I DON'T GET IT AT ALL WE ARE LEARNING ON \"SOLVING SYSTEMS BY GRAPHING AND SUBSTITUTION\" BUT THAT'S THE PART I DON'T GET CAN YALL PLEASE HELP ME?\r<BR>\n" );
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document.write( "HERE'S ONE OF THE PROBLEMS THEY GAVE ME<BR>\n" );
document.write( "3x + 2y=-12 & x + 2y=-2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #28012 by </B><A HREF=/tutors/aboutme.mpl?userid=jmg><B>jmg(22)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jmg><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=28012\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The answer will be the same but it depends on whether the directions say to solve by substitution or by graphing\r<BR>\n" );
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document.write( "BY SUBSTITUTION: \r<BR>\n" );
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document.write( "Solve the 2nd equation for x (just because its the easiest)<BR>\n" );
document.write( "x + 2y = -2, so x = -2y - 2 \r<BR>\n" );
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document.write( "Plug this back into the first equation in the system\r<BR>\n" );
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document.write( "3x + 2y = -2<BR>\n" );
document.write( "3(-2y - 2) + 2y = - 2<BR>\n" );
document.write( "-6y - 6 + 2y = - 2<BR>\n" );
document.write( "-4y - 6 = -2<BR>\n" );
document.write( "- 4y = 4<BR>\n" );
document.write( "y = -1\r<BR>\n" );
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document.write( "Now plus this back into where you solved for x.<BR>\n" );
document.write( "x = -2y - 2 <BR>\n" );
document.write( "x = -2 * -1 - 2<BR>\n" );
document.write( "x = 0\r<BR>\n" );
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document.write( "So there is one solution (0, - 1)\r<BR>\n" );
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document.write( "If you are working these problems and you get an answer like <BR>\n" );
document.write( " x = x or 2= 2, etc. The answer is infinite solutions (all the answers will be the same)\r<BR>\n" );
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document.write( "If you get something like 3= 2 or x = y or something weird like that, the answer is no solution. For example, 3 will never equal 2\r<BR>\n" );
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document.write( "If you have to solve by graphing, you just graph each line. The point where they meet is the one solution. \r<BR>\n" );
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document.write( "If they never meet, it is no solution\r<BR>\n" );
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document.write( "If it is the same line, it is infinite solutions </SPAN>\n" );
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