Răspunsuri

2014-09-27T10:38:30+03:00
|a|=8<=>a€{8;-8}
|x|=-8<=>x€{-8}
|-y|=2<=>y€{2}
|a+3|=1<=>a+3=1<=>a=-2     a+3=-1<=>a=-4
|-x-4|=5<=>-x-4=5<=>x=-9.   -x-4=-5<=>x=1
|3-6y|=12<=>3-6y=12<=>y=-1.    3-6y=-12<=>y=-5