Mathématiques

Question

Aidez moi svp, je galère :
Aidez moi svp, je galère :

1 Réponse

  • Bonjour,

    4x + 8 = 12

    4x = 12 - 8

    4x = 4

    x = 4/4

    x = 1

    4x - 5 = 3x - 4

    4x - 3x = - 4 + 5

    x = 1

    x + 1 = 5x + 21

    x - 5x = 21 - 1

    - 4x = 20

    x = - 20/4

    x = - 5

    6x - 9 = 10x + 11

    6x + 10x = 11 + 9

    16x = 20

    x = 20/16

    x = 5/4

    8x - 4 = x - 3

    8x - x = - 3 + 4

    7x = 1

    x = 1/7

    - 3x - 5 = - x - 7

    - 3x + x = - 7 + 5

    - 2x = - 2

    x = 2/2

    x = 1.