Mathématiques

Question

5 (3-2x) = - (4x+1)
-2(3+x) + 2x = 6(x+2)

2 Réponse

  • 5(3 - 2x) = - (4x + 1)
    15 - 10x = - 4x - 1
    15 + 1 = - 4x + 10x
    16 = 6x
    16/6 = x
    8/3 = x

    - 2(3 + x) + 2x = 6(x + 2)
    - 6 - 2x + 2x = 6x + 12
    - 6 = 6x + 12
    - 6 - 12 = 6x
    - 18 = 6x
    - 18/6 = x
    - 3 = x
  • 5 (3-2x) = - (4x+1)
    15 - 10x = - 4x  - 1
    -10x  + 4x =   - 1 -15
    -6x = -16
    x = 16/6
    x = 8/3



    -2(3+x) + 2x = 6(x+2)
    -6 - 2x + 2x = 6x +12
    - 6x  = 6 +12
    - 6x  = 18
    x = -18/6
    x = - 3


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