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5-(4supra 7-1supra 1 pe patru) rezolvatii






Răspuns :

5-(4/7-1/1/4)=5-(4/7-1*4)=5-(4/7-4)=5-(4/7-28/7)=5-(-24/7)=5+24/7=35/7+24/7=59/7