3) -3(x - 1) = 24 - 10x;

Решение:

1. \( -3(x - 1) = 24 - 10x \)
2. \( -3x + 3 = 24 - 10x \)
3. \( -3x + 10x = 24 - 3 \)
4. \( 7x = 21 \)
5. \( x = \frac{21}{7} \)
6. \( x = 3 \)

Ответ: x = 3.