document.write( "Question 83689: how do you find the graph of a system? \n" ); document.write( "
Algebra.Com's Answer #60207 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
Lets say you had the system of equations \r
\n" ); document.write( "\n" ); document.write( "\"x%2B2y=11\"
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Solved by pluggable solver: Solve the System of Equations by Graphing

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\n" ); document.write( " Start with the given system of equations:
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\n" ); document.write( " \"1x%2B2y=11\"
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\n" ); document.write( " \"5x%2B3y=34\"
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\n" ); document.write( " In order to graph these equations, we need to solve for y for each equation.
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\n" ); document.write( " So let's solve for y on the first equation
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\n" ); document.write( " \"1x%2B2y=11\" Start with the given equation
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\n" ); document.write( " \"2y=11-x\" Subtract \"+x\" from both sides
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\n" ); document.write( " \"2y=-x%2B11\" Rearrange the equation
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\n" ); document.write( " \"y=%28-x%2B11%29%2F%282%29\" Divide both sides by \"2\"
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\n" ); document.write( " \"y=%28-1%2F2%29x%2B%2811%29%2F%282%29\" Break up the fraction
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\n" ); document.write( " \"y=%28-1%2F2%29x%2B11%2F2\" Reduce
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\n" ); document.write( " Now lets graph \"y=%28-1%2F2%29x%2B11%2F2\" (note: if you need help with graphing, check out this solver)
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\n" ); document.write( " \"+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%28-1%2F2%29x%2B11%2F2%29+\" Graph of \"y=%28-1%2F2%29x%2B11%2F2\"
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\n" ); document.write( " So let's solve for y on the second equation
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\n" ); document.write( " \"5x%2B3y=34\" Start with the given equation
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\n" ); document.write( " \"3y=34-5x\" Subtract \"5+x\" from both sides
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\n" ); document.write( " \"3y=-5x%2B34\" Rearrange the equation
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\n" ); document.write( " \"y=%28-5x%2B34%29%2F%283%29\" Divide both sides by \"3\"
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\n" ); document.write( " \"y=%28-5%2F3%29x%2B%2834%29%2F%283%29\" Break up the fraction
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\n" ); document.write( " \"y=%28-5%2F3%29x%2B34%2F3\" Reduce
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\n" ); document.write( " Now lets add the graph of \"y=%28-5%2F3%29x%2B34%2F3\" to our first plot to get:
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\n" ); document.write( " Graph of \"y=%28-1%2F2%29x%2B11%2F2\"(red) and \"y=%28-5%2F3%29x%2B34%2F3\"(green)
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\n" ); document.write( " From the graph, we can see that the two lines intersect at the point (\"5\",\"3\") (note: you might have to adjust the window to see the intersection)
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