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

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

   8x - 6 = 18

   8x = 18 + 6

   8x = 24

   x = 24 : 8

   x = 3

2. 4 – 8,2x – (3,8x + 1) = 5

   4 – 8,2x – 3,8x – 1 = 5

   -12x + 3 = 5

   -12x = 5 - 3

   -12x = 2

   x = 2 : (-12)

   x = -1/6

Ответ:

1. x = 3
2. x = -1/6