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[(21186:a+1969:10+532]:73×15-50=100

Răspuns :

[(21186:a+1969+532)]:73x15-50=100
(21186:a+2501):73x15-50=100
(21186:a+2501):73x15=150
(21186:a+2501):73=10
21186:a+2501=730