Verified answer

Ответ:

Пошаговое объяснение:

1) -a +b + 2a - 3b = a - 2b

2) 4x - 3y -x + y = 3x - 2y

3) 3m - 4n + 2n - 3m = -2n

4) 7a - 10b + b - 7a = -9b

5) 25k - 12n +7k -7n +12n = 32k - 7n

6) 0.5m +2z +5m - 4z - 5m = 0.5m - 2z

7) 7n - 7m + 0.1m - 0.1n = 6.9 n - 6.9m

8) 0.09a + 0.01b - 0.9a + 0.9b = 0.91b - 0.81a