Помогите пожалуйста!!!


Приведите подобные слагаемые:

5а + 27а — а; 6x - 14 - 13x + 26;
12b - 17b - b; -8-y + 17 - 10y;

13a + 2b - 2a - b; -5,1a - 4b - 4,9a + b;
41x - 58x + 6y -y; 7,5x + y - 8,5x - 3,5y;
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