NARCOTIX57
Answered

1) 8 - (3x + 2) = 5x - 5
2) 7+2(3 - x) = 4x - 1
3) (7x - 1)(-2x - 5) = 0

Quelqu'un peut m'aider je comprends pas svpp​

Sagot :

Bonjour,

8 - 3x - 2 = 5x - 5

- 3x + 6 = 5x - 5

- 3x - 5x = - 5 - 6

- 8x = -11

x = -11/-8 = 11/8.

7 + 6 - 2x = 4x - 1

- 2x + 13 = 4x - 1

- 2x - 4x = - 1 - 13

- 6x = - 14

x = -14/-6 = 14/6 = 7/3.

7x - 1 = 0

7x = 1

x = 1/7

et

-2x - 5 = 0

-2x = 5

x = -5/2.