решите пожалуйста.) дам 25 баллов
1. (5a - 2b) - (3b - 4a).

2. (6с - b) - (2c + 3b).

3. 2.: - (3. + у) + 6y.

4. 8x - (3x - 2y) - 7y.

5. 0,5(a - 3b) - (3b + 0,5a).

6. 0,1 (a + 2b) - (0,2b - 0,2a).
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