Ответ:
14/15:7/5*9/10=14/15*5/7*9/10=14/21*9/10=2/3*9/10=18/30=3/5
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Ответ:
14/15:7/5*9/10=14/15*5/7*9/10=14/21*9/10=2/3*9/10=18/30=3/5