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Afla numarul necunoscut: (j+8357)-4842=8749; 75102+j-3402=859.

Răspuns :

a)
(j+8357)-4842=8749;
j+8357=8749+4842
j= 13591- 8357
j = 5234

b)
75102+j-3402=859
j+71700=859
j= - 70841