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Aflati b
(b:5*501-1):1000 =251


Răspuns :

b:5x501-1=251x1000
b:5x501-1=251000
b:5x501=251000+1
            =251001
b:5=251001:501
b:5=501
b=501x5
b=2505
b:5x501-1=251x1000=251000
b:5x501=251000+1=251001
b:5=251001:501
b:5=501
b=501x5
x=2505