Задание 1023, 6 класс:
Приведите подобные члены:
1) 19а – 12b – 7a + 24b;
2) 3 2/11x + 2 3/7x – 1 2/11x – 1 3/7x;
3) 7,5x – 9,4y – 3,5x + 4,4y;
4) 6/7x – 5/13y – 2/7x – 1/13y
Пожалуйста помогите! Даю 30 баллов
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