5 3/7-(b-2 1/7)=2 4/7 Решите пж!!
5 3/7 - (b - 2 1/7) = 2 4/7 b - 2 1/7 = 5 3/7 - 2 4/7 b - 2 1/7 = 2 6/7 b = 2 6/7 + 2 1/7 b = 5 -----------
Спасибо