40. Решите уравнение: 1) 10x - 4x = 2,226; 2) 6x + 2x + 2,352 = 4,2; 3) 7x - 10,36 = 6,51; 4) 4,42 - 14x = 3,3.

Решение:

1. 1)

   10x - 4x = 2,226

   6x = 2,226

   x = 2,226 / 6

   x = 0,371

2. 2)

   6x + 2x + 2,352 = 4,2

   8x = 4,2 - 2,352

   8x = 1,848

   x = 1,848 / 8

   x = 0,231

3. 3)

   7x - 10,36 = 6,51

   7x = 6,51 + 10,36

   7x = 16,87

   x = 16,87 / 7

   x = 2,41

4. 4)

   4,42 - 14x = 3,3

   14x = 4,42 - 3,3

   14x = 1,12

   x = 1,12 / 14

   x = 0,08

Ответ: 1) x = 0,371; 2) x = 0,231; 3) x = 2,41; 4) x = 0,08.