Автор - lhl77

Помогите... Пожалуйста ​

Ответ

Автор - cvalkabomza

1. (2 * 9) / (7 * 9) = 18/63

2. (8 * 7) / (9 * 7) = 56/63

3. (4 * 3) / (21 * 3) = 12/63

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