pouvez vous m'aider svp

Bonjour,

1)

4 (2x - 1) = 7

8x - 4 = 7

8x = 7 + 4

8x = 11

x = 11/8

- 4x - 10 = 5x - 1

- 4x - 5x = - 1 + 10

- 9x = 9

x = - 9/9

x = - 1

- 2x + 3 = - 2 (x - 5)

- 2x + 3 = - 2x + 10

- 2x + 2x = 10 - 3

0x = 7 --> Impossible.

2)

a)

f (x) = 8x

f (2) = 8 * 2

f (2) = 16

f (- 3) = 8 * - 3

f (- 3) = - 24

f (0) = 8 * 0

f (0) = 0

b)

8x = - 16

x = - 16/8

x = - 2

8x = 0

x = 0

8x = 28

x = 28/8

x = 3,5.