SOLUTION: For what value of x is the rational expression Below undefined X-4/4+x

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Question 625397: For what value of x is the rational expression Below undefined
X-4/4+x
Answer by reynard2007(52) About Me  (Show Source):
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In rational expressions, the denominator should not equal zero. The only instance 4+x=0 is when x=-4. So, the rational expression is undefined when x is -4