2. Задание
20 баллов

а) -10k + 11p + 8k - 12p = -2k - p
б) 1/6b - 2/7b - 2/3b - 31/14b = 7/42b - 12/42b - 28/42b - 93/42b = -126/42b

a)(-10k+9k)+(11p-12p)=-k-p
b)(1/6 b - 2/3 b) -( 2/7b + 2 3/14 b)= -3/6 b + 2 7/14 b = -1/2b + 2 1/2 b = 2b