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Afla numarul necunoscut:a+578=2993
b+3475=5782
c+1586=4792

P.S fiecare operatie are cate 3 randiri


Răspuns :

a+578=2993 
a=2993-578
a=2415

b+3475=5782 
b=5782-3475
b=2307

c+1586=4792  
c=4792-1586
c=3206

a+578=2993
a=2993-578
a=2415


b+3475=5782
a=5782-3475
a=2307

c+1586=4792
c=4792-1586
c=3206