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ECUATIA ESTE; B-5=(46-B+5)-6

Răspuns :

B-5 = (46-B+5)-6
B-5 = 46-B+5-6
2B = 46-1+5
2B = 50, B = 50/2, B = 25.
V : 25-5 = (46-25+5)-6
20 = 20 (A).