4. Решите уравнения: a) 32x + 14x - 27x + 5 = 100; б) (17x - 8x + 3) : 7 = 12.

4. Решение уравнений:

1. \( 32x + 14x - 27x + 5 = 100 \)
   \( (32 + 14 - 27)x + 5 = 100 \)
   \( 19x + 5 = 100 \)
   \( 19x = 100 - 5 \)
   \( 19x = 95 \)
   \( x = \frac{95}{19} \)
   \( x = 5 \)
2. \( (17x - 8x + 3) : 7 = 12 \)
   \( (9x + 3) : 7 = 12 \)
   \( 9x + 3 = 12 \cdot 7 \)
   \( 9x + 3 = 84 \)
   \( 9x = 84 - 3 \)
   \( 9x = 81 \)
   \( x = \frac{81}{9} \)
   \( x = 9 \)

Ответ: a) x = 5; б) x = 9.