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calculeaza numarul necunoscut
m+11905=20005 
n-45016=26987
400000-X=127035



Răspuns :

m+11905=20005     m=20005-11905   m= 8100
n-45016=26987       n= 45016 + 26987  n=72003
400000-X=127035     X=400000-127035   X=272965