9b^2 + 36b + 36 + 3*(b^3 + 4b^2 + 16b - 4b^2 - 16b - 64) - 3*(b^3 + 3b^2 + 3b + 1) = 3

9b^2 + 36b + 36 + 3b^3 - 192 - 3b^3 - 9b^2 - 9b - 3 = 3

36b - 9b = 192 + 3 + 3

27b = 198

b = 198 / 27

b = 22/7 или 3 1/7