S’il vous plaît aider moi Résous les équations suivantes : (écris bien tous les calculs) 1. 2x + 4 = 7 3. 3x – 10 = 6x – 4 2. – 3x + 8 = – 1 4. 5x + 4 = – 2x +

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1. 2x + 4 = 7

2x = 7 - 4

2x = 3

x = 3/2 = 1,5

3. 3x – 10 = 6x – 4

3x - 6x = - 4 + 10

-3x = 6

x = 6/(-3) = -2

2. – 3x + 8 = – 1

-3x = -1-8

x = 9/3 = 3

5x + 4 = – 2x + 32

5x + 2x = 32 - 4

7x = 28

x = 28/7 = 4

Réponse :

Explications étape par étape

1. 2x + 4 = 7

2x = 7 - 4

2x = 3

x = 3/2 = 1,5

3. 3x – 10 = 6x – 4

3x - 6x = - 4 + 10

-3x = 6

x = 6/(-3) = -2

2. – 3x + 8 = – 1

-3x = -1-8

x = 9/3 = 3

5x + 4 = – 2x + 32

5x + 2x = 32 - 4

7x = 28

x = 28/7 = 4