document.write( "Question 143376: Hello, can anyone help me with this? \r
\n" ); document.write( "\n" ); document.write( "Solve the following system by graphing.\r
\n" ); document.write( "\n" ); document.write( "x + y = 6
\n" ); document.write( "x - y = 3
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Algebra.Com's Answer #104352 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%2By=6\"\r
\n" ); document.write( "\n" ); document.write( "\"1x-y=3\"\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%2By=6\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"1y=6-x\" Subtract \"+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"1y=-x%2B6\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-x%2B6%29%2F%281%29\" Divide both sides by \"1\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-1%2F1%29x%2B%286%29%2F%281%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=-x%2B6\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets graph \"y=-x%2B6\" (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+-x%2B6%29+\" Graph of \"y=-x%2B6\"\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( "\"1x-y=3\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"-y=3-x\" Subtract \"+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"-y=-x%2B3\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-x%2B3%29%2F%28-1%29\" Divide both sides by \"-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-1%2F-1%29x%2B%283%29%2F%28-1%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=x-3\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets add the graph of \"y=x-3\" 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+-x%2B6%2Cx-3%29+\" Graph of \"y=-x%2B6\"(red) and \"y=x-3\"(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 (\"9%2F2\",\"3%2F2\") (note: using a graphing calculator will help you find the point of intersection)
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