Зведи подібні доданки.
Решение пж
a) 10a + a - 10a - a;
б) -8x + 7x + 6x + 7x;
в) - 8x - 5,2x + 3х + 5x;
г) -6a + 5a - a + 2a.
с 8 марта
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