Mathématiques

Question

Résoudre chaque équation :

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

Merci par avance pour votre aide.

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
    6x = 16
    x = 16/6
    x = 8/3



    -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
    x = - 3

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