[tex]\it |-x-1|=|-(x+1)|=|x+1|[/tex]
Ecuația devine:
[tex]\it |x+1|+|x+1|=0 \Rightarrow 2|x+1|=0 \Rightarrow |x+1|=0 \Rightarrow x+1=0 \Rightarrow x=-1[/tex]
