Bonsoir,

La prochaine fois merci d'écrire les équations ...

a. 8a - 2 = 3 (4a - 5)

8a - 2 = 12a - 15

8a - 12a = - 15 + 2

- 4a = - 13

a = 13/4

b. - 3 (1 + 2t) = (1 - 5t) * 4

- 3 - 6t = 4 - 20t

- 6t + 20t = 4 + 3

14t = 7

t = 7/14

t = 1/7.

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

- 2x + 2 = - 20 - 15x

- 2x + 15x = - 20 - 2

- 13x = - 22

x = 22/13.

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

- 2x + 10 = - 2x + 3

- 2x + 2x = 3 - 10

0x = - 7 --> Impossible