Verified answer

Ответ:

1)b-3a

2)-x-4

.........

Verified answer

1) 3a - 7b - 6a + 8b = (8b - 7b) + (3a - 6a) = b - 3a

2) 5x - 7x - 3 + x - 1 = (5x - 7x + x) - 3 - 1 = - x - 4