Ответ:
7/8•(3/7+1/3)=
3/7+1/3= 9/21+7/21= 16/21
7•16/8•21= 1•2/1•3= 2/3
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Ответ:
7/8•(3/7+1/3)=
3/7+1/3= 9/21+7/21= 16/21
7•16/8•21= 1•2/1•3= 2/3