Question 1109257
Because you have to allow for the fact that {{{x+2=0}}}. 
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So you can set the problem up ad divide by {{{x+2}}} if you allow that {{{x+2<>0}}}. 
Then you would have no solution. 
But typically you go into a problem not knowing any information about the solution so you wouldn't place a restriction on the solution. 
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However, in this case, {{{x=-2}}} or {{{x+2=0}}} so by not allowing the solution, you get no solution.