Question

Знайдіть корінь рівняння 1) 5x + 8 = 3(2x - 4) - x 2) 4,1(2 - 3x) = 1.2 - (12, 3x + 3.8) 3) -3(x + 2) - 2 = 0 4) (2x - 5) + 3 = 8 5) (x + 4)/4 - (x - 3)/6 = 2 ​

Answer 1

Відповідь:

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

  5x + 8 = 6x - 12 - x

  5x + x = 6x - 12 - 8

  6x - 6x = -20

  x = -20

2. 4,1(2 - 3x) = 1.2 - (12, 3x + 3.8)

  8.2 - 12.3x = 1.2 - 12.3x - 3.8

  12.3x + 12.3x = 1.2 - 8.2 - 3.8

  24.6x = -10.8

  x = -10.8 / 24.6

  x = -4/9

3. -3(x + 2) - 2 = 0

  -3x - 6 - 2 = 0

  -3x - 8 = 0

  -3x = 8

  x = -8/3

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

  2x - 5 + 3 = 8

  2x - 2 = 8

  2x = 10

  x = 5

5. (x + 4)/4 - (x - 3)/6 = 2

  6(x + 4) - 4(x - 3) = 48

  6x + 24 - 4x + 12 = 48

  2x + 36 = 48

  2x = 12

  x = 6

Пояснення: