document.write( "Question 144155: I have one more question.
\n" ); document.write( "Solve the system of equations by graphing. Then classify the system as consistent or inconsistent, and the equation as dependent or independent.
\n" ); document.write( "5x - y = 25
\n" ); document.write( "5x + 6y = -10
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Algebra.Com's Answer #104919 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( "\"5x-y=25\"\r
\n" ); document.write( "\n" ); document.write( "\"5x%2B6y=-10\"\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( "\"5x-y=25\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"-y=25-5x\" Subtract \"5+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"-y=-5x%2B25\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-5x%2B25%29%2F%28-1%29\" Divide both sides by \"-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-5%2F-1%29x%2B%2825%29%2F%28-1%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=5x-25\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets graph \"y=5x-25\" (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+5x-25%29+\" Graph of \"y=5x-25\"\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( "\"5x%2B6y=-10\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"6y=-10-5x\" Subtract \"5+x\" from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"6y=-5x-10\" Rearrange the equation\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-5x-10%29%2F%286%29\" Divide both sides by \"6\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-5%2F6%29x%2B%28-10%29%2F%286%29\" Break up the fraction\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-5%2F6%29x-5%2F3\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets add the graph of \"y=%28-5%2F6%29x-5%2F3\" 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+5x-25%2C%28-5%2F6%29x-5%2F3%29+\" Graph of \"y=5x-25\"(red) and \"y=%28-5%2F6%29x-5%2F3\"(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 (4,-5). Since the two graphs intersect each other at one point, this means that the system is consistent and independent.
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