Вопрос:

2. 4(5x + 2) = 7x - 5

Ответ:

\(4(5x + 2) = 7x - 5 \)
\(20x + 8 = 7x - 5 \)
\(20x - 7x = -5 - 8 \)
\(13x = -13 \)
\(x = -13 / 13 \)
\(x = -1 \)

Ответ: x = -1