document.write( "Question 107469: I am having problems absolute value solving inequalities. I have two problems. I think I solved them, but I am not 100% sure.
\n" ); document.write( "|5x+6|>26\r
\n" ); document.write( "\n" ); document.write( "x| x<-4 or x>4\r
\n" ); document.write( "\n" ); document.write( "the second problem is:\r
\n" ); document.write( "\n" ); document.write( "|2x-4| =16\r
\n" ); document.write( "\n" ); document.write( "x= -6 and 10
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Algebra.Com's Answer #78255 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
#1\r
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\n" ); document.write( "\n" ); document.write( "\"abs%285x%2B6%29%3E26\" Start with the given inequality\r
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\n" ); document.write( "\n" ); document.write( "Break up the absolute value (remember, if you have \"abs%28x%29%3E+a\", then \"x+%3C+-a\" or \"x+%3E+a\")\r
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\n" ); document.write( "\n" ); document.write( "\"5x%2B6+%3C+-26\" or \"5x%2B6+%3E+26\" Break up the absolute value inequality using the given rule\r
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\n" ); document.write( "\n" ); document.write( "Now lets focus on the first inequality \"5x%2B6+%3C+-26\"\r
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\n" ); document.write( "\n" ); document.write( "\"5x%2B6%3C-26\" Start with the given inequality\r
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\n" ); document.write( "\n" ); document.write( "\"5x%3C-26-6\"Subtract 6 from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"5x%3C-32\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x%3C%28-32%29%2F%285%29\" Divide both sides by 5 to isolate x \r
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\n" ); document.write( "\n" ); document.write( "\"x%3C-32%2F5\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "Now lets focus on the second inequality \"5x%2B6+%3E+26\"\r
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\n" ); document.write( "\n" ); document.write( "\"5x%2B6%3E26\" Start with the given inequality\r
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\n" ); document.write( "\n" ); document.write( "\"5x%3E26-6\"Subtract 6 from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"5x%3E20\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x%3E%2820%29%2F%285%29\" Divide both sides by 5 to isolate x \r
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\n" ); document.write( "\n" ); document.write( "\"x%3E4\" Divide\r
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\n" ); document.write( "\n" ); document.write( "So our answer is\r
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\n" ); document.write( "\n" ); document.write( "\"x+%3C+-32%2F5\" or \"x+%3E+4\"\r
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\n" ); document.write( "\n" ); document.write( "which looks like this in interval notation\r
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\n" ); document.write( "\n" ); document.write( "if you wanted to graph the solution set, you would get\r
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\n" ); document.write( "\n" ); document.write( " Graph of the solution set in blue and the excluded values represented by open circles\r
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\n" ); document.write( "\n" ); document.write( "\"abs%282x-4%29=16\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "Break up the absolute value (remember, if you have \"abs%28x%29=a\", then \"x=-a\" or \"x=a\")\r
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\n" ); document.write( "\n" ); document.write( "\"2x-4=-16\" or \"2x-4=16\" Set the expression \"2x-4\" equal to the original value 16 and it's opposite -16\r
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\n" ); document.write( "\n" ); document.write( "Now lets focus on the first equation \"2x-4=-16\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x-4=-16\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"2x=-16%2B4\"Add 4 to both sides\r
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\n" ); document.write( "\n" ); document.write( "\"2x=-12\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x=%28-12%29%2F%282%29\" Divide both sides by 2 to isolate x\r
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\n" ); document.write( "\n" ); document.write( "\"x=-6\" Divide\r
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\n" ); document.write( "\n" ); document.write( "So our answer is \"x=-6\" \r
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\n" ); document.write( "\n" ); document.write( "Now lets focus on the second equation \"2x-4=16\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x-4=16\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"2x=16%2B4\"Add 4 to both sides\r
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\n" ); document.write( "\n" ); document.write( "\"2x=20\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x=%2820%29%2F%282%29\" Divide both sides by 2 to isolate x\r
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\n" ); document.write( "\n" ); document.write( "\"x=10\" Divide\r
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\n" ); document.write( "\n" ); document.write( "So our answer is \"x=10\" \r
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\n" ); document.write( "\n" ); document.write( "So the solutions to \"abs%282x-4%29=16\" are:\r
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\n" ); document.write( "\n" ); document.write( "Notice if we graph \"y=abs%282x-4%29\" and \"y=16\" (just set each side equal to y and graph), we get\r
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\n" ); document.write( "\n" ); document.write( "\"graph%28500%2C500%2C-20%2C20%2C-2%2C20%2Cabs%282x-4%29%2C16%29\" Graph of \"y=abs%282x-4%29\" (red) and \"y=16\"(green)\r
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\n" ); document.write( "\n" ); document.write( "and we can see the two graphs intersect at \"x=-6\" and \"x=10\". So this verifies our answer.\r
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