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132*4-c+12*2=348. 15*19+245*7+d=2900
Afla nr necunoscute


Răspuns :

132*4-c=348-124
528-c=224
-c=224-528
-c=-304 / (-1)
c=304


15*19+245*7+d=29000
285+1710+d=29000
1710+d=29000-285
1710+d=28715
d=28715-1710
d=27005