document.write( "Question 127777: Solve this system of equations by graphing:
\n" ); document.write( "x – 2y = 8
\n" ); document.write( "3x – 2y = 12
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Algebra.Com's Answer #93602 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Start with the given system of equations:\r
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\n" ); document.write( "\n" ); document.write( "\"1x-2y=8\"\r
\n" ); document.write( "\n" ); document.write( "\"3x-2y=12\"\r
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\n" ); document.write( "\n" ); document.write( "In order to graph these equations, we need to solve for y for each equation.\r
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\n" ); document.write( "\n" ); document.write( "So let's solve for y on the first equation\r
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\n" ); document.write( "\n" ); document.write( "\"1x-2y=8\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"-2y=8-x\" Subtract \"+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"-2y=-x%2B8\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-x%2B8%29%2F%28-2%29\" Divide both sides by \"-2\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-1%2F-2%29x%2B%288%29%2F%28-2%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=%281%2F2%29x-4\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets graph \"y=%281%2F2%29x-4\" (note: if you need help with graphing, check out this solver)\r
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%281%2F2%29x-4%29+\" Graph of \"y=%281%2F2%29x-4\"\r
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\n" ); document.write( "\n" ); document.write( "So let's solve for y on the second equation\r
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\n" ); document.write( "\n" ); document.write( "\"3x-2y=12\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"-2y=12-3x\" Subtract \"3+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"-2y=-3x%2B12\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-3x%2B12%29%2F%28-2%29\" Divide both sides by \"-2\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-3%2F-2%29x%2B%2812%29%2F%28-2%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=%283%2F2%29x-6\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets add the graph of \"y=%283%2F2%29x-6\" to our first plot to get:\r
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%281%2F2%29x-4%2C%283%2F2%29x-6%29+\" Graph of \"y=%281%2F2%29x-4\"(red) and \"y=%283%2F2%29x-6\"(green)\r
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\n" ); document.write( "\n" ); document.write( "From the graph, we can see that the two lines intersect at the point (\"2\",\"-3\")
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