Question

7 7/30 -(5 11/30-y)=3 19/30

Answer 1

7 7/30 -(5 11/30-y)=3 19/30

7 7/30-3 19/30=5 11/30-у

108/30=5 11/30-у

у=5 11/30-108/30

у=53/30

Проверка

7 7/30 -(5 11/30-53/30)=3 19/30

7 7/30-108/30=3 19/30

3 19/30=3 19/30