Răspuns :
11-[(106×2-728:4):a]×2=5
11-[(212-182):a]×2=5
11- (30:a)×2=5
(30:a)×2= 11- 5
(30:a)×2= 6
(30:a) = 6:2
30:a = 3
a =30:3
a = 10
11-[(212-182):a]×2=5
11- (30:a)×2=5
(30:a)×2= 11- 5
(30:a)×2= 6
(30:a) = 6:2
30:a = 3
a =30:3
a = 10
11 - [(106*2 - 728:4):a]*2=5
-(106*2 - 728:4):a = (5-11):2
-(212 - 182):a = -3
-30:a=-3
a = -30: -3
a = 10
-(106*2 - 728:4):a = (5-11):2
-(212 - 182):a = -3
-30:a=-3
a = -30: -3
a = 10