3. Решите уравнение: в) 48 = 11 - (9a + 2); г) 13 - (5х + 11) = 6x;

Решение:

1. в) 48 = 11 - (9a + 2)
   \( 48 = 11 - 9a - 2 \)
   \( 48 = 9 - 9a \)
   \( 9a = 9 - 48 \)
   \( 9a = -39 \)
   \( a = -\frac{39}{9} = -\frac{13}{3} \)
2. г) 13 - (5х + 11) = 6x
   \( 13 - 5x - 11 = 6x \)
   \( 2 - 5x = 6x \)
   \( 2 = 6x + 5x \)
   \( 2 = 11x \)
   \( x = \frac{2}{11} \)

Ответ: a = -13/3; x = 2/11.