Question

15 7/39-(11 4/39-y)=6 19/39

Answer 1

15 7/39 - (11 4/39 - у) = 6 19/39

15 7/39 - 11 4/39 + у = 6 19/39

4 3/39 + у = 6 19/39

у = 6 19/39 - 4 3/39

у = 2 целых 16/39

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Проверка: 15 7/39 - (11 4/39 - 2 16/39) = 6 19/39

                   15 7/39 - (10 43/39 - 2 16/39) = 6 19/39

                   14 46/39 - 8 27/39 = 6 19/39 - верно