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6-5:[4-3:(2-2:b)]=1

Aflati-l pe B


Răspuns :

prin incercari repetate ajungi aici:
b=o
1:[1:(2-2:0)]=1
1:[1:(2-0)]=1
1:1:2=1 deci fals

b=1
1:[1:(2-2:1)]=1
1:[1:(2-2)]=1
1:1:0=1 deci fals

b=2
1:[1:(2-2:2)]=1
1:[1:(2-1)]=1
1:1:1=1