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ajutor la matematica va rog
9236-[(3245-1236+63×4:2):5+a]+23124=31860


Răspuns :

9236-[(3245-1236+63×4:2):5+a]+23124=31860
9236-[(2009+252:2):5+a]=31860-23124
9236-[(2009+126):5+a]=8736
(2135:5+a)=9236-8736
427+a=500
a=500-427
a=73