document.write( "Question 146598: How do you solve |2x + 6| - 4 = 20, whats the answer? \n" ); document.write( "
Algebra.Com's Answer #107046 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "\"abs%282x%2B6%29-4=20\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"abs%282x%2B6%29=24\" Add 4 to both sides.\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%2B6=-24\" or \"2x%2B6=24\" Set the expression \"2x%2B6\" equal to the original value 24 and it's opposite -24\r
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\n" ); document.write( "\n" ); document.write( "Now lets focus on the first equation \"2x%2B6=-24\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x=-24-6\"Subtract 6 from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"2x=-30\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x=%28-30%29%2F%282%29\" Divide both sides by 2 to isolate x\r
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\n" ); document.write( "\n" ); document.write( "\"x=-15\" Divide\r
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\n" ); document.write( "\n" ); document.write( "Now lets focus on the second equation \"2x%2B6=24\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x=24-6\"Subtract 6 from both sides\r
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\n" ); document.write( "\n" ); document.write( "\"2x=18\" Combine like terms on the right side\r
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\n" ); document.write( "\n" ); document.write( "\"x=%2818%29%2F%282%29\" Divide both sides by 2 to isolate x\r
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\n" ); document.write( "\n" ); document.write( "\"x=9\" Divide\r
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\n" ); document.write( "\n" ); document.write( "So the solutions to \"abs%282x%2B6%29-4=20\" are:\r
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\n" ); document.write( "\n" ); document.write( "\"x=-15\" and \"x=9\"\r
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\n" ); document.write( "\n" ); document.write( "Notice if we graph \"y=abs%282x%2B6%29-4\" and \"y=20\" (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-17%2C11%2C-10%2C25%2Cabs%282x%2B6%29-4%2C20%29\" Graph of \"y=abs%282x%2B6%29-4\" (red) and \"y=20\"(green)\r
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\n" ); document.write( "\n" ); document.write( "and we can see the two graphs intersect at \"x=-15\" and \"x=9\". So this verifies our answer.\r
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