document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=101436>Question 101436</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello out there,I really need some help with some tough problems,the first one is,Solve the system of linear equations by graphing:4x-y=6 and 3x+y=1.The next one is,Use substitution to solve : 2x+y=7 and 5x-2y=4.The third one is,Use substitution to solve: x=3y-2 and 2x+4y=16.And the last one is,Find the solution of the system y=x^2+5 and y=2x+4.Thanks to whoever can help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #73853 by </B><A HREF=/tutors/aboutme.mpl?userid=vertciel><B>vertciel(183)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vertciel><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=73853\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hello there,\r<BR>\n" );
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document.write( "1. Graph 4x - y = 6 and 3x + y = 1\r<BR>\n" );
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document.write( "I recommend reading http://www.purplemath.com/modules/graphlin.htm first. This should help.\r<BR>\n" );
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document.write( "2. 2x + y = 7 and 5x - 2y = 4\r<BR>\n" );
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document.write( "We'll substitute in y since it is easier.\r<BR>\n" );
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document.write( "2x + y = 7\r<BR>\n" );
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document.write( "y = 7 - 2x\r<BR>\n" );
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document.write( "Substitute y into 5x - 2y = 4:\r<BR>\n" );
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document.write( "5x - 2(7 - 2x) = 4\r<BR>\n" );
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document.write( "5x - 14 + 2x = 4\r<BR>\n" );
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document.write( "3x = 18\r<BR>\n" );
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document.write( "x = 6\r<BR>\n" );
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document.write( "Therefore, y = 7 - 2(6)\r<BR>\n" );
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document.write( "= -5 \r<BR>\n" );
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document.write( "3. x = 3y - 2 and 2x + 4y = 16 \r<BR>\n" );
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document.write( "Try it yourself. See if you can solve this from question 2. \r<BR>\n" );
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document.write( "4. y = x^2 + 5 and y = 2x + 4\r<BR>\n" );
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document.write( "You can just set these equations equal to each other because they both equal y.\r<BR>\n" );
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document.write( "x^2 + 5 = 2x + 4\r<BR>\n" );
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document.write( "x^2 - 2x + 1 = 0\r<BR>\n" );
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document.write( "Do you know how to solve equations with a square power?\r<BR>\n" );
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document.write( "If not, you can graph the two equations and find the point of intersection.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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