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72:a=9 si (45+19):c=8

Răspuns :

72:a = 9
a=72:9
a=8

(45+19):c=8
64:c=8
c=64:8
c=8
72:a=9 => a = 72:9 => a = 8
64:c=8 => c = 64:8 => c = 8