Mathématiques

Question

Bonjour, qui pourrait m’aider SVP merci d’avance :)
Résoudre les équations :

a. 8x + 3 = 0

b. 2x - 9 = 0

c. 49 - 7x = 0

d. -6x - 5 = 0

e. 5x + 12 = 3

f. 10x + 1 = -7

g. 9x - 2 = 6

h. 20 - 4x = -4

1 Réponse

  • bonjour,

    8 x + 3 = 0

    8 x = - 3

    x = - 3/8

    2 x - 9 = 0

    2 x =  9

    x = 9/2

    49 - 7 x = 0

    - 7 x = - 49

    x = 7

    - 6 x - 5 = 0

    - 6 x = 5

    x = - 5/6

    10 x + 1 = - 7

    10 x = - 7 - 1

    10 x = - 8

    x = - 8/10 = - 4/5

    9 x - 2 =  6

    9 x = 6 + 2

    9 x = 8

    x = 8/9

    20 - 4 x = - 4

    - 4 x = - 4 - 20

    - 4 x = - 24

    x = 6

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