№5. Решите уравнения 1) (2х-7) + (6x + 1) = 18 2) (4 - 8,2x) - (3,8x + 1) = 5

Решим каждое уравнение:

1. $$(2x - 7) + (6x + 1) = 18$$

   $$2x - 7 + 6x + 1 = 18$$

   $$8x - 6 = 18$$

   $$8x = 24$$

   $$x = 3$$

2. $$(4 - 8,2x) - (3,8x + 1) = 5$$

   $$4 - 8,2x - 3,8x - 1 = 5$$

   $$-12x + 3 = 5$$

   $$-12x = 2$$

   $$x = -\frac{2}{12} = -\frac{1}{6}$$

Ответ: 1) x=3; 2) x=-1/6