document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=953533>Question 953533</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Pre-Algebra: Find the three solutions to the equation below.\r<BR>\n" );
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document.write( "2x - 4y = 4\r<BR>\n" );
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document.write( "	a. (3,0) (4,0 (-4,0)\r<BR>\n" );
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document.write( "	b. (2,0) (8,4) (-2,1)\r<BR>\n" );
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document.write( "	c. (0,-1) (2,0) (1,-1/2)<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #582320 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=582320\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let's go through the choices\r<BR>\n" );
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document.write( "Choice A) (3,0) (4,0) (-4,0) \r<BR>\n" );
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document.write( "the first point of choice A is (3,0) which means x = 3 and y = 0. They BOTH need to make the equation true.\r<BR>\n" );
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document.write( "2x - 4y = 4<BR>\n" );
document.write( "2(3) - 4(0) = 4 ... plug in (x,y) = (3,0)<BR>\n" );
document.write( "6 - 0 = 4<BR>\n" );
document.write( "6 = 4 ... this is false, so (3,0) is NOT a solution making choice A NOT an answer. We move on to the next choice\r<BR>\n" );
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document.write( "Choice B) (2,0) (8,4) (-2,1) \r<BR>\n" );
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document.write( "Checking (2,0)\r<BR>\n" );
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document.write( "2x - 4y = 4<BR>\n" );
document.write( "2(2) - 4(0) = 4<BR>\n" );
document.write( "4 - 0 = 4<BR>\n" );
document.write( "4 = 4 ... looks good\r<BR>\n" );
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document.write( "Checking (8,4)\r<BR>\n" );
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document.write( "2x - 4y = 4<BR>\n" );
document.write( "2(8) - 4(4) = 4<BR>\n" );
document.write( "16 - 16 = 4<BR>\n" );
document.write( "0 = 4 ... false, so we eliminate choice B\r<BR>\n" );
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document.write( "Choice C) (0,-1) (2,0) (1,-1/2)\r<BR>\n" );
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document.write( "Checking (0,-1)\r<BR>\n" );
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document.write( "2x - 4y = 4<BR>\n" );
document.write( "2(0) - 4(-1) = 4<BR>\n" );
document.write( "0 + 4 = 4<BR>\n" );
document.write( "4 = 4 ... looks good\r<BR>\n" );
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document.write( "Checking (2,0)\r<BR>\n" );
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document.write( "2x - 4y = 4<BR>\n" );
document.write( "2(2) - 4(0) = 4<BR>\n" );
document.write( "4 - 0 = 4<BR>\n" );
document.write( "4 = 4 ... looks good\r<BR>\n" );
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document.write( "Checking (1, -1/2)\r<BR>\n" );
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document.write( "2x - 4y = 4<BR>\n" );
document.write( "2(1) - 4(-1/2) = 4<BR>\n" );
document.write( "2 + 2 = 4<BR>\n" );
document.write( "4 = 4 ... looks good\r<BR>\n" );
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document.write( "So in the end, choice C is the answer since ALL of the points listed in choice C make the equation true.\r<BR>\n" );
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document.write( "Jim\r<BR>\n" );
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