Вопрос:

Ответ:

\[3(b - 1) - 1 = 8(b - 1) - 6\]

\[3b - 3 - 1 = 8b - 8 - 6\]

\[3b - 8b = - 14 + 4\]

\[- 5b = - 10\]

\[b = 2.\]