Bonjour pouvez vous m’aider s’il vous plaît merci

Réponse :

Explications étape par étape

5x - 2 = 7x + 14

5x = 7x + 14 + 2 = 7x +16

5x - 7x = 16

-2x = 16

x = 16/-2 = -8

x = -8

7x + 3 = -2x + 8

7x = -2x +8 -3 = -2x +5

7x + 2x = 5

9x = 5

x = 5/9

-4x + 5 = 3 - 2x

-4x = 3 - 2x - 5 = -2 - 2x

-4x + 2x = -2

-2x = -2

x = -2/-2 = 1

8x - 2 = 4x - 7

8x = 4x -7 +2 = 4x -5

8x - 4x = -5

4x = -5

x = -5/4