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Afla numarul X din urmatoarele exercitii: a.(4.536-X)-3.215= 509 b.3.786-(X+927)+1.250=3.503 c.(7.873-X)-(5.784-X)=1.059

Răspuns :

4536-x=3215+509
4536-x=3724
X=4536-3724
X=812