document.write( "Question 124408: Solve each of the following systems by graphing.\r
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\n" ); document.write( "4x + 3y = 12
\n" ); document.write( " x + y = 2\r
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Algebra.Com's Answer #91166 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( "\"4x%2B3y=12\"\r
\n" ); document.write( "\n" ); document.write( "\"1x%2By=2\"\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( "\"4x%2B3y=12\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"3y=12-4x\" Subtract \"4+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"3y=-4x%2B12\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-4x%2B12%29%2F%283%29\" Divide both sides by \"3\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-4%2F3%29x%2B%2812%29%2F%283%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-4%2F3%29x%2B4\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets graph \"y=%28-4%2F3%29x%2B4\" (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+%28-4%2F3%29x%2B4%29+\" Graph of \"y=%28-4%2F3%29x%2B4\"\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%2By=2\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"1y=2-x\" Subtract \"+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"1y=-x%2B2\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-x%2B2%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%282%29%2F%281%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=-x%2B2\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets add the graph of \"y=-x%2B2\" 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+%28-4%2F3%29x%2B4%2C-x%2B2%29+\" Graph of \"y=%28-4%2F3%29x%2B4\"(red) and \"y=-x%2B2\"(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 (\"6\",\"-4\") (note: you might have to adjust the window to see the intersection)
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