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c) ? - 60 < 130
) ? + 200 < 700


Răspuns :

1) x-60<130⇒ x<130+60⇒ x<190 ⇒ x∈{189,188,187.........62,61,60}
2)x+200<700⇒ x<700-200 ⇒x<500⇒ x∈{0,1,2,3,4........497,498,499}