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3/4=0,751/4=0,250,75у-12=-5-0,25-120,75у=-5-0,25-12+120,75у=-5,25у=-5,25/0,75у=-7. ответ:-7
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3/4=0,751/4=0,250,75у-12=-5-0,25-120,75у=-5-0,25-12+120,75у=-5,25у=-5,25/0,75у=-7. ответ:-7