document.write( "Question 637657: Here is the problem:\r
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document.write( "The solution set of which of the following equations is the set of real numbers that are 5 units from -3?\r
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document.write( "I know that it ends up being |x+3|=5. However, why does the negative 3 become +3 in the equation? \r
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document.write( "Thank you. \n" );
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Algebra.Com's Answer #401790 by MathLover1(20850)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "The absolute-value notation is bars, not parentheses or brackets. \n" ); document.write( "Use the proper notation; the other notations do not mean the same thing.\r \n" ); document.write( "\n" ); document.write( "It is important to note that the absolute value bars do NOT work in the same way as do parentheses. \n" ); document.write( "Whereas –(–3) = +3, this is NOT how it works for absolute value:\r \n" ); document.write( "\n" ); document.write( " Simplify –| –3 |.\r \n" ); document.write( "\n" ); document.write( " Given –| –3 |, I first handle the absolute value part, taking the positive and converting the absolute value bars to parentheses:\r \n" ); document.write( "\n" ); document.write( " –| –3 | = –(+3)\r \n" ); document.write( "\n" ); document.write( " Now I can take the negative through the parentheses:\r \n" ); document.write( "\n" ); document.write( " –| –3 | = –(3) = –3\r \n" ); document.write( "\n" ); document.write( "As this illustrates, if you take the negative of an absolute value, you will get a negative number for your answer. \n" ); document.write( " |